How Do I Search Patents by Patent Number?
Patent number lookup is the fastest way to find a known patent. Learn the difference between grant, publication, and application numbers.
If you have a patent number, searching is usually straightforward. Enter the number into a patent search tool and open the record.
The main confusion is that people call several different identifiers "patent numbers."
Issued Patent Numbers
An issued US patent number usually looks like:
- US 12,155,501 B2
- 12,155,501
- US12155501B2
The B2 kind code usually means an issued utility patent that was examined and granted.
Publication Numbers
A published application looks like:
- US 2022/0182257 A1
- 2022/0182257
- US20220182257A1
This is not the same thing as an issued patent. It is a published application. Some applications later become patents; some do not.
Application Numbers
A US application number usually looks like:
- 17/437,360
- 17437360
Application numbers track the application file. They are useful for prosecution history, continuity, and status.
Why Direct Lookup Sometimes Fails
Lookup can fail if the number is missing digits, has the wrong kind code, uses a publication format when the tool expects a grant format, or is actually an application number.
Patent Bear's main search is designed to detect patent, publication, and application numbers so users do not have to know the exact category first.
What to Check After You Find the Record
Once you open the record, check:
- title
- assignee
- inventors
- filing date
- priority date
- publication number
- application number
- status
- related family records
Those details tell you whether you found the right record and how it fits into the larger application history.
Look up the exact record
Paste a patent, publication, or application number and let Patent Bear open the matching record.