Granted Patent
Utility
US 4,635,755 · App. 06/691,899
Backwound pre-stressed spring motor and method
Inventor:
John C. Arechaga
Patented Case
View Patent ↗
Granted: Jan 13, 1987
Filed: Jan 16, 1985
Inventor
John C. Arechaga
Assignee (at issue)
Ametek, 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.