Granted Patent
Utility
US 5,226,630 · App. 07/826,431
Valve disc and drive shaft assembly
Inventors:
Phillip J. Haseley, Michael Morris
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Jan 27, 1992
Inventors
Phillip J. Haseley
Michael Morris
Assignee (at issue)
BTR plc
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.