Granted Patent
Utility
US 4,425,821 · App. 06/214,641
Engine balancer
Inventor:
Floyd G. West
Patented Case
View Patent ↗
Granted: Jan 17, 1984
Filed: Dec 10, 1980
Inventor
Floyd G. West
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.