Granted Patent
Utility
US 5,662,542 · App. 08/509,772
Actuating drive having a spring return feature
Inventor:
Werner Birchmeier
Patented Case
View Patent ↗
Granted: Sep 2, 1997
Filed: Aug 1, 1995
Inventor
Werner Birchmeier
Assignee (at issue)
Johnson Service 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.