Granted Patent
Utility
US 4,587,389 · App. 06/679,349
Snap action timer switch assembly
Inventor:
John Willigman
Patented Case
View Patent ↗
Granted: May 6, 1986
Filed: Dec 7, 1984
Inventor
John Willigman
Assignee (at issue)
Controls Corporation of America
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.