Granted Patent
Utility
US 4,422,396 · App. 06/398,025
Belt retainer guard for sewing machine
Inventors:
Jan Szostak, Henry Schaeflern
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Jul 14, 1982
Inventors
Jan Szostak
Henry Schaeflern
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.