TWIN DIAPHRAGM
USPTO (United States) · Serial 73824540
- Status
- cancelled
- Status updated
- 4 March 1997
- Filing date
- 11 September 1989
- Registration date
- 28 August 1990
- Nice classification
- 28
- Owner
- QUAKER BOY INC.
- Owner country
- US
- Raw status code
- 710
As filed by US
Authoritative source
The official US trademark record is at USPTO TSDR (serial 73824540) ↗. Where our data differs from the USPTO record, theirs is correct.
See methodology for refresh cadence + status normalisation. See sources for licensing.