Granted Patent
Utility
US 4,372,231 · App. 06/290,892
Buttonhole paddle switch position sensing arrangement in a sewing machine
Inventors:
Charles R. Odermann, John W. Wurst
Patented Case
View Patent ↗
Granted: Feb 8, 1983
Filed: Aug 7, 1981
Inventors
Charles R. Odermann
John W. Wurst
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.