Granted Patent
Utility
US 4,475,736 · App. 06/465,602
Bushing seal valve
Inventor:
Gerald Lesiecki
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: Feb 10, 1983
Inventor
Gerald Lesiecki
Assignee (at issue)
Allis-Chalmers Corporation
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.