Granted Patent
Utility
US 4,366,352 · App. 06/182,720
Two-speed continuous drive timer
Inventor:
George Obermann
Patented Case
View Patent ↗
Granted: Dec 28, 1982
Filed: Aug 29, 1980
Inventor
George Obermann
Assignee (at issue)
The Singer Company Limited
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.