What is a trademark watch?
If you own a brand, the registers never stop moving. Every week, somebody, somewhere, files a new trademark that may sit a little too close to yours. A trademark watch is the standing arrangement that catches those filings while you still have time to act.
The definition
A trademark watch is a continuous monitoring service over one or more trademark registers. You give it a list of marks — your own brand, your product names, maybe a competitor or two — and the watch flags new applications that look similar enough to be worth a closer look. The output is a stream of alerts: “this application published last week, here is the mark, here is the owner, here is the deadline to oppose.”
Watches differ from one-off clearance searches. A clearance search is a snapshot — the answer is “as of today, here’s what’s filed.” A watch is a subscription — the answer is “tell me whenever something changes.” Both have a place; this post is about the second one.
Why monitor proactively
There are two ways to defend a trademark portfolio. The first is reactive enforcement: you discover an infringer in the wild — on a shelf, on a website, in an ad — and you send a cease-and-desist or sue. By the time you’ve spotted the infringement, the other party has already invested in their brand. Pulling them off the market is slow, expensive, and contested. Sometimes you lose.
The second is proactive opposition. Most jurisdictions publish new trademark applications before they grant, and give third parties a fixed window — typically 30 to 90 days — to oppose. If you catch a conflicting application during that window, opposition is dramatically cheaper than litigation. The applicant hasn’t spent money on packaging, marketing, or distribution yet. Often the matter ends with a withdrawal or a coexistence agreement, not a lawsuit.
Trademark watches exist to make proactive opposition workable. Without a watch, you’d need someone to read every gazette in every relevant jurisdiction the day it publishes. Nobody does that by hand any more.
What sources matter
Trademarks are jurisdictional, so a watch is only as good as the registers it actually reads. The sources that matter most:
- WIPO Global Brand Database — the closest thing to a global view. It aggregates international filings made under the Madrid System plus contributions from many national offices. If you’re tracking a brand with international reach, this is the one source you cannot skip.
- National offices — USPTO for the United States, EUIPO for the European Union, UKIPO for the UK, and so on. National offices catch domestic-only filings that never go international, which is the majority of filings.
For Trademark Sentinel, WIPO Global Brand Database is the source we cover at launch. Direct adapters for USPTO and EUIPO are on the v2 roadmap; we’d rather ship one source well than three sources poorly. If your enforcement strategy depends on national-only US filings today, factor that in.
What an alert looks like in practice
Once you’ve defined a watchlist — say, your brand “Acme” plus the variants “Acme Pro” and “Acme Cloud” — a typical alert might read:
New application: ACMEE CLOUD — Filed 2026-04-28 by Acmee Holdings Ltd in Nice classes 9, 42. Similarity: 0.86 (visual + phonetic). Watchlist match: “Acme Cloud”. Source: WIPO GBD. Opposition window: closes 2026-07-28.
The interesting fields:
- Similarity score — a measure of how close the filed mark is to the watched mark, by visual edit distance and phonetic comparison. Modern watch services expose this so you can triage quickly: a 0.95 needs review today, a 0.55 might be a coincidence.
- Class match — the Nice classification context. A clothing-class filing for “Acme” matters more if you sell clothing than if you sell software. (We cover Nice in a separate post.)
- Deadline — the opposition window for the relevant office. Miss it and your cheapest option disappears.
Good alerts let you make a yes/no decision in under a minute. Bad alerts bury the conflict in noise; that’s why similarity scoring and class filtering matter so much.
What a watch is not
A watch is not a legal opinion. It surfaces things worth looking at; whether to oppose is still a judgment call, often involving counsel. A watch is also not a guarantee — registers have publication delays, and similarity scoring is imperfect by design (too strict and you miss conflicts, too loose and you drown in alerts). Treat it as a daily news feed for your brand, not as infallible truth.
Where to go from here
If you’re setting up watches for the first time:
- Read the user guide on watches for how to configure a watchlist, set similarity thresholds, and filter by Nice class.
- Start a free watch — the signup form takes about a minute.
The cheapest opposition is the one you file before the other side has even seen the artwork. A watch is how you get there.