Granted Patent
Utility
US 5,152,580 · App. 07/774,651
Handle assembly for chair control mechanism
Inventor:
William S. Stumpf
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Oct 15, 1991
Inventor
William S. Stumpf
Assignee (at issue)
Faultless-Doerner Manufacturing Inc.
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.