Granted Patent
Utility
US 4,351,168 · App. 06/220,520
Torsion vibration damper
Inventors:
George T. Prince, Gerardus M. Ballendux
Patented Case
View Patent ↗
Granted: Sep 28, 1982
Filed: Dec 29, 1980
Inventors
George T. Prince
Gerardus M. Ballendux
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.