Granted Patent
Utility
US 4,601,374 · App. 06/459,184
Hydraulic clutch piston and seal
Inventor:
Eli M. Ladin
Patented Case
View Patent ↗
Granted: Jul 22, 1986
Filed: Jan 19, 1983
Inventor
Eli M. Ladin
Assignee (at issue)
Federal-Mogul 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.