NDAs for Inventors: When to Use Them and What to Include

An inventor's greatest vulnerability is the gap between having an idea and having legal protection for it. During that gap — which can last months while a patent application is prepared — sharing the invention with anyone risks losing control of it. The Non-Disclosure Agreement (NDA) is the primary tool that bridges this gap. Used correctly, it creates a contractual layer of protection that supplements and extends the protection a patent eventually provides.

Used carelessly — or not used at all — an NDA either fails to protect what matters or creates a false sense of security that leads inventors to share more than they should.

What an NDA Does

A Non-Disclosure Agreement (also called a Confidentiality Agreement or CA) is a legally binding contract in which one or more parties agree not to disclose specified confidential information to third parties, and to use that information only for specified purposes.

An NDA does not stop someone from stealing your idea. It creates a legal remedy if they do. If a party who signed your NDA uses your confidential information without permission, you can sue them for breach of contract — potentially recovering damages, injunctions preventing further use, and in some jurisdictions, punitive damages.

For inventors, an NDA serves three functions:

Protection before filing. Before a patent application is filed, your invention is entirely unprotected. An NDA creates a contractual obligation of confidentiality covering that period. Without it, disclosure to any third party — manufacturer, investor, collaborator, potential licensee — risks the information entering the public domain, potentially destroying novelty and any future patent rights.

Supplementing patent protection. A granted patent protects the claims it contains. The surrounding know-how — your manufacturing process, your testing data, your commercial insights — is not in the patent and is not protected by it. An NDA covers this know-how even after the patent is published.

Triggering trade secret protection. In most jurisdictions, trade secret protection requires that the owner take "reasonable measures" to keep the information confidential. Consistently using NDAs is one of the most important of those measures. Without NDAs, courts may find that no trade secret exists at all.

When to Use an NDA

The short answer is: before sharing anything substantive about your invention with anyone outside your immediate household.

Specifically, use an NDA before:

Approaching manufacturers or fabricators. Even describing what you want made may be enough to disclose the core inventive concept. A Shenzhen factory, a local machine shop, or a contract electronics manufacturer should all sign an NDA before you share design files, specifications, or drawings.

⚠ Manufacturing in China? This NDA is not enough.

A standard Western NDA — including the iInvent template below — is practically unenforceable against a Chinese manufacturer. It does not cover non-use (the factory using your design to manufacture competing products for its own account) or non-circumvention (the factory contacting your customers directly). And if it is governed by non-Chinese law, Chinese courts will not enforce it.

For any Chinese manufacturing relationship, you need an NNN Agreement: Non-Disclosure, Non-Use, Non-Circumvention — governed by Chinese law, with CIETAC or SHIAC arbitration, drafted bilingually with Chinese as the controlling language.

Read: [NNN Agreements: Why Your NDA Won't Protect You in China →]

Download: [iInvent NNN Agreement Template (English/Chinese) →]

Pitching to investors. Many angel investors and VCs refuse to sign NDAs before initial meetings — a reasonable position given the volume of pitches they receive. In this case, share only what is already published (if you have a filed application) or only general information that does not reveal the specific inventive concept. Once serious discussions begin and mutual interest is established, an NDA is appropriate.

Hiring contractors or consultants. Any engineer, designer, chemist, or specialist who will learn confidential details of your invention should sign an NDA (and ideally an IP assignment clause) before engagement begins. See: Co-Inventor Agreements: What They Are and Why You Need One

Meeting with potential licensees or business partners. Even preliminary exploratory discussions with potential licensees can involve disclosure of commercially sensitive information about the invention, your patent strategy, your pricing expectations, and your customer relationships.

Presenting at conferences or competitions. Some inventor competitions and accelerator programmes require participants to submit detailed information about their inventions. If the event does not have its own confidentiality policy, request an NDA before submitting.

Working with patent illustrators or drawing services. Patent illustrators see the technical details of your invention. Most reputable services have standard confidentiality policies; confirm this or request an NDA.

When NOT to Rely on an NDA Alone

An NDA is a contractual remedy, not a prevention mechanism. It should always accompany — never replace — a patent filing for commercially significant inventions. Key limitations:

NDAs are only as good as their enforcement. If the other party breaches the NDA and you need to recover damages, you must identify the breach, prove it in court, and enforce any judgment — which is expensive, slow, and uncertain, particularly across borders.

Large companies often have policies against signing inventor NDAs. Many corporations refuse unsolicited NDA requests before an initial conversation, citing legal risk from their employees coincidentally working on similar technology. If a large company will not sign your NDA before any discussion, limit what you share to information that is already in a published patent application.

An NDA does not prevent independent discovery. If another inventor independently develops the same idea and files a patent application before you, your NDA provides no protection against that outcome. File your patent application as soon as reasonably possible.

An NDA cannot create patent rights retroactively. If you have disclosed your invention to someone without an NDA and without a patent filing, an NDA signed afterwards does not restore the novelty you may have compromised.

What Actually Happens When Inventors Skip the NDA

The risks above are not theoretical. Here is a scenario that plays out regularly in the invention world:

An inventor develops a novel bracket mechanism for mounting solar panels on curved rooftops. Excited to validate the idea, he emails CAD files to three local fabricators asking for quotes. No NDA. No patent filed yet. Just an email with attachments and a message saying "can you make this?"

One fabricator — the one who does not respond to the quote request — forwards the files to a colleague who runs a solar installation company. Six months later, a nearly identical bracket appears on the market. The inventor files a patent, but during examination, the examiner finds the competitor's product listing — which now counts as prior art because it was publicly offered for sale before the inventor's filing date. The patent is rejected on novelty grounds.

The inventor's own email, sent without an NDA, set the chain of events in motion. With a signed NDA, the fabricator's disclosure to a third party would have been a clear breach of contract — actionable in court, with damages. Without it, the inventor has no contractual claim, no patent, and no remedy.

An NDA costs nothing to prepare (use our template below) and five minutes to get signed. The alternative can cost you the entire invention.

Types of NDA

One-Way (Unilateral) NDA

The most common type for inventors. One party (the disclosing party — the inventor) shares confidential information with the other party (the receiving party — the manufacturer, investor, or collaborator), and only the receiving party has confidentiality obligations.

Use this when: you are sharing your invention with a manufacturer, investor, or potential licensee and they are not sharing anything confidential with you.

Mutual (Bilateral) NDA

Both parties share confidential information and both have confidentiality obligations. Common in joint development discussions, partnerships, or when a company is evaluating a licensing deal and sharing their own technical or commercial information in the process.

Use this when: both parties will be disclosing confidential information to each other — for example, a licensing negotiation where the licensee shares product roadmap details and market data in exchange for learning about your invention.

Multilateral NDA

Three or more parties all have mutual confidentiality obligations. Used in complex joint development arrangements with multiple collaborators. More complex to draft but reduces the number of separate bilateral NDAs required.

What a Strong Inventor NDA Includes

1. Clear Definition of Confidential Information

This is the most important clause. Vague definitions lead to disputes about what was and was not covered.

A strong definition should:

• Describe the general subject matter (your invention, your patent strategy, your business plans)
• Cover all formats (written, oral, electronic, visual — including information shared verbally in a meeting)
• Exclude information that is already public, that the receiving party already knew, or that they received from a third party who was entitled to disclose it

Common weakness to avoid: Limiting "confidential information" only to documents marked "CONFIDENTIAL." Oral disclosures in meetings are some of the most significant — your NDA should explicitly cover them.

2. Obligations of the Receiving Party

The receiving party should be required to:

• Keep the information confidential and not disclose it to any third party without prior written consent
• Use the information only for the specified permitted purpose (evaluating a potential business relationship, providing a specific service, etc.)
• Limit access to the information within their own organisation to those who need to know, and ensure those individuals are bound by equivalent confidentiality obligations
• Not reverse engineer, copy, or exploit the information for any purpose not expressly permitted

3. Permitted Purpose

Specify exactly what the receiving party may do with the information. "Evaluating a potential manufacturing relationship" or "providing engineering design services for the invention described" are specific. "Business purposes" is not.

The narrower the permitted purpose, the stronger your protection.

4. Duration

NDAs must specify how long confidentiality obligations last. Options:

Fixed term: 2–5 years is common for commercial discussions. Some jurisdictions will not enforce perpetual confidentiality obligations as unreasonable restraints.

Tied to patent filing: Obligations continue until a patent is published (which puts the information in the public domain) — at which point the patent provides its own protection.

Tied to trade secret life: For information that remains a trade secret, obligations continue for as long as the information remains confidential. This is the strongest option for know-how that will never be patented.

A typical well-drafted inventor NDA covers at least 3–5 years from the date of disclosure or last disclosure, with trade secret know-how covered for as long as it remains confidential.

5. Return or Destruction of Information

The receiving party should be required to return or destroy all confidential information — including copies, notes, and derivative works — upon request or upon termination of the relationship. Increasingly, NDA provisions require certification of destruction.

6. No Licence Grant

Explicitly state that the NDA does not grant any licence, right, or interest in the confidential information or any associated intellectual property. This prevents any argument that the disclosure implied permission to use the information.

7. No Obligation to Disclose

State that neither party is obligated to disclose any particular information. This prevents an argument that you were required to share everything you knew.

8. Remedies for Breach

Include an acknowledgment that breach of the NDA would cause irreparable harm for which monetary damages would be inadequate, and that the disclosing party is entitled to seek injunctive relief — a court order to stop the breach — in addition to monetary damages. This language is important in some jurisdictions for obtaining emergency injunctions quickly.

9. Governing Law and Jurisdiction

Specify which country's law governs the NDA and which courts have jurisdiction over disputes. For international NDAs, consider arbitration rather than national courts.

Practical guidance by region:

• US-counterparty: Choose the law of a US state (Delaware, New York, or California are common)
• European counterparty: Choose English law (predictable, well-developed commercial law) or the law of the counterparty's home jurisdiction
• Chinese counterparty: A standard NDA is insufficient for Chinese manufacturing relationships. You need an NNN Agreement — Non-Disclosure, Non-Use, Non-Circumvention — governed by Chinese law with CIETAC or SHIAC arbitration. A Western-law NDA is practically unenforceable against a Chinese company in Chinese courts. See: [NNN Agreements: Why Your NDA Won't Protect You in China →]
• Japanese/Korean counterparty: Local law NDAs enforced locally; arbitration in Singapore or Tokyo is an alternative
• GCC counterparty: DIFC law (Dubai International Financial Centre) or Qatari law; DIAC or QICCA arbitration is often preferred over national courts for commercial disputes

10. Entire Agreement

State that the NDA constitutes the entire agreement between the parties on confidentiality and supersedes any prior discussions. This prevents arguments about informal assurances given before the NDA was signed.

NDA Enforceability Around the World

An NDA is only as useful as it is enforceable. Enforceability varies by jurisdiction:

United States: NDAs are broadly enforceable under state contract law. Courts will not enforce provisions that are unreasonably broad in scope, duration, or geography — but a well-drafted NDA covering a legitimate business interest is routinely enforced, including through emergency injunctions.

United Kingdom: NDAs are enforceable as contracts. Courts will imply a duty of confidence even without a written NDA in some circumstances (the Coco v. Clark three-part test). A written NDA provides much stronger and clearer protection.

Germany: NDAs are enforceable under contract law. Germany's strong trade secret framework (aligned with the EU Trade Secrets Directive) means breach of a commercial NDA can also trigger trade secret remedies alongside contract claims.

France: NDAs are enforceable. French courts have broad powers to grant urgent measures (référé) to stop a breach quickly.

China: Chinese-law NDAs are enforceable in Chinese courts. Foreign-law NDAs covering Chinese parties are practically unenforceable in China — Chinese courts generally will not enforce foreign judgments in commercial IP disputes against domestic companies. For any Chinese manufacturing relationship, a standard NDA is not sufficient: you need an NNN Agreement (Non-Disclosure, Non-Use, Non-Circumvention) governed by Chinese law with CIETAC or SHIAC arbitration. The NNN adds two protections that a standard NDA lacks — a non-use clause (preventing the manufacturer from using your designs to compete with you) and a non-circumvention clause (preventing the manufacturer from going directly to your customers). See: NNN Agreements: Why Your NDA Won't Protect You in China

Japan: NDAs are broadly enforceable under Japanese contract law. Japanese courts are efficient and reliable for commercial contract enforcement, though litigation is relatively slow compared to emergency injunction proceedings in some Western jurisdictions.

South Korea: Korean-law NDAs are enforceable. Korea's strong IP court system means injunctive relief is available for NDA breaches that threaten IP rights.

Singapore: Singapore law NDAs are well-enforced by Singaporean courts, which apply English common law principles. Singapore is a favoured seat for international commercial arbitration across Asia.

India: NDAs are enforceable under the Indian Contract Act 1872. Enforcement can be slow in the Indian court system; arbitration clauses and careful governing law selection are advisable for cross-border agreements involving Indian parties.

UAE (DIFC): NDAs governed by DIFC law (which is English-law based) are enforced by the Dubai International Financial Centre Courts — a sophisticated English-language commercial court system widely used for regional commercial disputes. Outside DIFC, UAE federal courts apply UAE civil law.

Qatar (QFC): The Qatar Financial Centre similarly provides an English-law commercial court framework for registered entities. Qatar's civil courts apply Qatari law for general commercial disputes. QICCA (Qatar International Centre for Conciliation and Arbitration) provides regional arbitration services.

Saudi Arabia: Saudi courts apply Sharia-based commercial law. NDAs are recognised as contracts but enforcement can be less predictable than in codified law jurisdictions. Arbitration under Saudi Centre for Commercial Arbitration (SCCA) rules is a growing alternative.

Practical Tips for Using NDAs

Always sign before disclosing. Once information is shared, it is too late to create confidentiality obligations for that disclosure. The NDA must be signed before the meeting, the call, the factory visit, or the email.

Keep signed copies. Maintain a signed copy of every NDA you execute. An NDA you cannot produce in court is worthless.

Record what you disclosed and when. After a meeting or disclosure covered by an NDA, make a brief dated note of what was shared. This documentation is invaluable if a dispute arises.

Do not rely on verbal NDAs. Some jurisdictions recognise verbal confidentiality agreements in certain circumstances, but they are almost impossible to enforce in practice. Always get signatures — electronic signatures are legally valid in most major jurisdictions.

Review NDAs presented to you. If a counterparty presents their own NDA for you to sign, read it carefully. Look at the definition of confidential information (does it capture your information?), the permitted purpose (is it appropriately narrow?), and any clauses that might give them rights over your invention or its improvements.

Use electronic signing tools. DocuSign, Adobe Sign, HelloSign, and equivalent platforms create legally binding electronic signatures with timestamps and audit trails. They are faster than wet ink signatures and provide better documentation.

Download the iInvent NDA Templates

iInvent provides professionally drafted NDA templates for the most common inventor scenarios:

• One-Way NDA — Inventor to Manufacturer
• One-Way NDA — Inventor to Investor/Licensee
• Mutual NDA — Joint Development Discussion
• NDA with IP Assignment Clause — Contractor Engagement

Each template includes plain-language explanations of key clauses and guidance notes on adapting for different jurisdictions.

Sources

1. WIPO - Trade Secrets and Confidentiality — International framework for trade secret protection and confidentiality under TRIPS Article 39
2. USPTO - Protecting Your Invention — US guidance on protecting inventions before and during the patent process
3. UKIPO - Intellectual Property Office — UK guidance on confidentiality agreements and IP protection
4. CNIPA — Chinese IP protection including NDA and NNN agreement enforceability considerations