Granted Patent
Utility
US 5,657,664 · App. 08/508,486
Transmission for an actuating drive having a spring return feature
Inventor:
Werner Birchmeier
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Jul 28, 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.