Granted Patent
Utility
US 4,549,569 · App. 06/656,486
Locking valve construction
Inventor:
John H. Taylor
Patented Case
View Patent ↗
Granted: Oct 29, 1985
Filed: Oct 1, 1984
Inventor
John H. Taylor
Assignee (at issue)
McGard LLC
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.