An NDA is a written promise that the person you are showing your idea to will keep it confidential and will not use it for themselves. It is the cheapest protection available to an inventor, and it takes minutes to put in place.
It is not a substitute for a patent filing, and it will not make a large corporation look at your concept. Used at the right moment, though, it lets you talk openly with prototypers, suppliers, freelancers and potential partners without giving your idea away.
What an inventor's NDA actually does
A non-disclosure agreement defines what information is confidential, who may hear it, how long the obligation lasts and what happens if it is broken. It creates a contractual duty, which means a breach becomes a legal matter rather than bad luck.
What it cannot do is stop someone from independently developing something similar, or protect anything you have already published, sold or demonstrated publicly.
The clauses your NDA template should contain
- Parties — full legal names and addresses of both sides, and whether the agreement is one-way or mutual.
- Definition of confidential information — drawings, prototypes, specifications, costings, supplier names, test results and the idea itself.
- Exclusions — information already public, already known to the receiver, or independently developed without your input.
- Permitted use — the receiver may use the information only to evaluate or perform the specific project, nothing else.
- Permitted disclosure — named employees or contractors who are bound by equivalent terms.
- Term — how long confidentiality lasts, commonly two to five years from disclosure.
- Return or destruction of materials at the end of discussions.
- No licence clause — nothing in the NDA transfers ownership or grants rights to the invention.
- Governing law and jurisdiction — which country's or state's courts decide a dispute.
- Signatures and date for both parties.
One-way or mutual?
A one-way NDA is right when only you are disclosing, which is the usual case with a manufacturer, engineer or designer. A mutual NDA covers both sides and is normal when you are discussing a joint project or a licensing partner will share their own confidential plans.
Most companies accept a mutual version more readily, so if a one-way NDA gets pushback, offering the mutual form often unblocks the conversation.
Who will sign and who will not
When a company refuses to sign, file a provisional patent application first, then disclose only what the conversation needs. Patent pending status plus a careful disclosure is usually the stronger route with a big brand.
- Usually will sign — contract manufacturers, prototype shops, engineers, industrial designers, freelancers, packaging suppliers and most small businesses.
- Usually will not sign — large consumer-goods corporations, retail buyers and open submission portals, which require you to submit under their own terms.
- Rarely relevant — patent attorneys, who already owe you professional confidentiality.
How to use an NDA without killing the deal
- Send it early and casually, before the meeting, as a standard step rather than a challenge.
- Keep it to two pages. A long agreement drafted for software licensing scares off small suppliers.
- Set a realistic term. Five years is credible for a consumer product; perpetual confidentiality usually gets negotiated out.
- Follow the paperwork with a dated summary email of what you disclosed, which is valuable evidence later.
- Never disclose more than the stage requires — a supplier needs dimensions and materials, not your margin structure.
Where an NDA sits in your protection plan
Sequence matters: keep records of your development work, file a provisional patent application when the concept is defined enough to describe, use an NDA for every private conversation, and only publish or exhibit once you have a filing date.
An NDA is the everyday layer. The patent filing is the durable one. Together they cost a fraction of what most inventors expect.
Frequently asked questions
Is an NDA enough to protect my invention?
No. An NDA binds the people who sign it, but it does not stop independent development and gives you no rights against the wider market. Combine it with a provisional patent application when the concept is defined enough to describe in writing.
How long should an inventor's NDA last?
Two to five years from the date of disclosure is common and usually accepted. Very long or perpetual terms are frequently negotiated out by suppliers and partners.
Will a manufacturer sign an NDA?
Most contract manufacturers and prototype shops will sign a short, reasonable agreement. Large corporations and retail buyers often refuse and ask you to submit under their own terms instead.
Do I need a lawyer to prepare an NDA?
A standard template covers ordinary supplier and freelancer conversations. Take legal advice for high-value deals, unusual terms or cross-border agreements where enforcement is complex.
Get the NDA and IP protection pack
A ready-to-send NDA plus supporting IP protection documents written for inventors, in an instant download you can use for every supplier conversation.