Granted Patent
Utility
US 5,385,333 · App. 08/192,813
Method of making valve disc and drive shaft assembly
Inventors:
Michael Morris, Phillip J. Haseley
Patented Case
View Patent ↗
Granted: Jan 31, 1995
Filed: Feb 7, 1994
Inventors
Michael Morris
Phillip J. Haseley
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.