Granted Patent
Utility
US 4,379,601 · App. 06/244,376
Sewing machine cradle safety interlock
Inventor:
William G. Hauser
Patented Case
View Patent ↗
Granted: Apr 12, 1983
Filed: Mar 16, 1981
Inventor
William G. Hauser
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.