KEYSTONE HELICOPTER SERVICES
USPTO (United States) · Serial 74199291
- Status
- cancelled
- Status updated
- 5 February 2016
- Filing date
- 29 August 1991
- Registration date
- 27 October 1992
- Nice classification
- 37
- Owner
- Keystone Helicopter Corporation
- Owner country
- US
- Raw status code
- 710
As filed by US
Authoritative source
The official US trademark record is at USPTO TSDR (serial 74199291) ↗. Where our data differs from the USPTO record, theirs is correct.
See methodology for refresh cadence + status normalisation. See sources for licensing.