Granted Patent
Utility
US 4,917,321 · App. 07/184,820
Centrifugal brake arm and retainer
Inventor:
Dennis E. Roberts
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Apr 22, 1988
Inventor
Dennis E. Roberts
Assignee (at issue)
ZEBCO HOLDINGS, 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.