LOCK & LEARN
USPTO (United States) · Serial 72250862
- Status
- registered
- Status updated
- 3 November 1992
- Filing date
- 22 July 1966
- Registration date
- 12 March 1968
- Nice classification
- 22
- Owner
- POTOMAC ENGINEERING CORPORATION
- Owner country
- US
- Raw status code
- 900
As filed by US
Authoritative source
The official US trademark record is at USPTO TSDR (serial 72250862) ↗. Where our data differs from the USPTO record, theirs is correct.
See methodology for refresh cadence + status normalisation. See sources for licensing.