Reference
All 45 trademark classes
The Nice Classification sorts every trademark into one of 45 classes. Here's what each covers, with the number of US trademarks actually registered in it — counted from the live USPTO index, not copied from a table.
Last updated July 2026
Goods — classes 1 to 34
Services — classes 35 to 45
Filtering by class in the API
Every search endpoint accepts an international_code filter, so you can scope results or clearance checks to the classes that could actually block you:
curl "https://api.markbase.co/search?q=acme&international_code=9"
Query any class from the API
Counts, filters, and clearance scoping across all 45 classes — free tier, no key needed to try.
Frequently asked questions
What are trademark classes?
The Nice Classification divides goods and services into 45 classes — 1 to 34 for goods, 35 to 45 for services. You file a trademark in the classes matching what you actually sell, and your rights are generally limited to those classes.
How many classes should I file in?
Only the ones covering your real goods or services. Each additional class costs a separate USPTO filing fee, and claiming classes you don't operate in can leave a registration vulnerable.
Can two companies own the same name in different classes?
Often yes. DELTA exists as an airline, a faucet manufacturer, and dental insurance because they occupy different classes and are unlikely to be confused. That's why class-scoped clearance matters more than a raw name search.
Where do these counts come from?
Markbase indexes the USPTO's daily bulk data — 14M+ live and dead US trademarks. The per-class counts on these pages are computed from that index and refresh daily.