Granted Patent
Utility
US 4,326,613 · App. 06/147,139
Solenoid activated spring clutch
Inventor:
Don M. Houlberg
Patented Case
View Patent ↗
Granted: Apr 27, 1982
Filed: May 6, 1980
Inventor
Don M. Houlberg
Assignee (at issue)
Joerns Furniture Company
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.