Granted Patent
Utility
US 4,471,182 · App. 06/473,889
Single pole make make switch and pressure switch using same
Inventors:
Thaddeus S. Wielgos, Richard L. Lauritsen
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Mar 10, 1983
Inventors
Thaddeus S. Wielgos
Richard L. Lauritsen
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.