Granted Patent
Utility
US 4,351,556 · App. 06/105,631
Seat suspension
Inventor:
Thomas J. Worringer
Patented Case
View Patent ↗
Granted: Sep 28, 1982
Filed: Dec 20, 1979
Inventor
Thomas J. Worringer
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.