Trade shows are where device companies find distributors, strategic partners, and their first real customers. They are also where a surprising number of patent portfolios quietly die.
The Rule
Exhibiting a device publicly is a public disclosure under 35 U.S.C. § 102. It does not matter whether you sell anything, whether you hand out spec sheets, or whether attendees signed anything at the door.
In the United States, that disclosure starts a twelve-month clock under the § 102(b) grace period. File within twelve months and your own disclosure does not bar you. Miss it and it does.
In Europe, China, Japan, and most other markets, there is no grace period. Those rights end the day the booth opens.
If your device has any international commercial future, and most medical devices do, the trade show is a hard deadline that arrives before you think it does.
A limited exception exists in a few jurisdictions for officially recognized international exhibitions, sometimes providing six months. It is narrow, requires specific certification, and is not something to build a plan around.
What Counts at a Show
More than the booth itself:
- The device on the table, visible to anyone walking past
- Spec sheets, brochures, and one-pagers handed out
- Demonstrations, including in a closed-door meeting room if attendees have not signed NDAs
- The exhibitor directory listing, if it describes how the device works
- Poster sessions and podium presentations at the co-located scientific meeting
- Press releases and trade press coverage timed to the show
- Your website update launching the same week
The show is usually the visible event in a cluster of disclosures, and the earliest one in that cluster is the date that governs.
What to Do, and When
Eight weeks out. Decide what you are showing and what is actually new about it. This is a technical question, not a marketing one. The answer determines what needs to be on file.
Six weeks out. Get the provisional application drafted. Not a sketch and a photo. A description with enough technical detail to enable the invention: materials, dimensional relationships, actuation, tolerances that matter, and the alternatives you have considered. This is the step that determines whether the filing is worth anything.
Four weeks out. File it. Earlier is better and there is no benefit to waiting. If the design changes between filing and the show, file an updated provisional. There is no limit on how many you file.
Two weeks out. Review what marketing is preparing. Booth graphics, handouts, the website update, and the press release all disclose. Confirm the filing covers what they describe.
At the show. Use NDAs for genuinely detailed technical conversations with potential partners. This does not undo the public display, but it protects information beyond what the display reveals, which is often the more valuable material.
Within twelve months. Convert to a non-provisional. Docket this the day you file the provisional, because it will arrive during a busy period and it cannot be extended.
If the Show Is Next Week
Not ideal, but not fatal. Priorities in order:
- File something. A rushed provisional with real technical content is better than nothing. Focus the available time on describing the mechanism precisely rather than on polish.
- Limit what you display. You can exhibit without revealing internal mechanisms. A closed housing and a functional demonstration disclose considerably less than a cutaway and a detailed spec sheet.
- Pull the technical detail from handouts. Marketing materials frequently describe more than the physical display does.
- Use NDAs for the deep conversations.
- Document the date precisely. If you end up relying on the grace period, you need to know exactly when the clock started.
If You Already Exhibited
Work through it in order. Do not assume it is over.
Find the earliest disclosure date. The show may not be it. Check press releases, website changes, the exhibitor directory, and any conference abstract. The earliest one governs.
Determine what was actually revealed. The bar reaches what was publicly available. If you displayed a device but never disclosed the internal mechanism, aspects may remain unbarred. Worth analyzing carefully rather than assuming the worst.
Calculate the U.S. deadline and treat it as immovable. Twelve months from that earliest date.
Assess foreign rights honestly. Usually gone. Plan around a U.S.-only position, which for many device companies is still the majority of the addressable market.
Look at what you have improved since. Post-disclosure development may be independently patentable.
The Version That Costs Nothing
File a provisional before the show.
It removes every question in this article. It is not examined, does not publish, gives you twelve months of patent pending, and costs a small fraction of what your booth costs. Set against the value of European and Asian rights, it is among the highest-return filings in patent practice.
If you have a show on the calendar, request a free consultation and mention the date. If it is close, call as well.
This article is general educational information, not legal advice, and reading it does not create an attorney-client relationship. Patent law is fact specific and deadlines are unforgiving. For advice on your situation, schedule a consultation.