Granted Patent
Utility
US 4,733,622 · App. 07/017,951
Thread end holder for sewing machine with thread winding bobbin
Inventors:
Robert H. Larsen, Jan Szostak
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Feb 24, 1987
Inventors
Robert H. Larsen
Jan Szostak
Assignee (at issue)
SSMC Inc.
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.