Granted Patent
Utility
US 4,667,533 · App. 06/731,302
Positive drive override mechanism
Inventor:
Robert J. Duga
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: May 7, 1985
Inventor
Robert J. Duga
Assignee (at issue)
Emhart Industries, Inc.
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.