Granted Patent
Utility
US 4,536,628 · App. 06/598,947
Pushbutton switch assembly with integrated lock-down switch
Inventor:
Werner Willhaus
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Apr 11, 1984
Inventor
Werner Willhaus
Assignee (at issue)
International Standard Electric 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.