Granted Patent
Utility
US 4,448,141 · App. 06/514,136
Sewing machine cam controlled feed engaging and disengaging mechanism
Inventors:
Jan Szostak, Henry Schaeflern, Walter H. W. Marsh
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Jul 15, 1983
Inventors
Jan Szostak
Henry Schaeflern
Walter H. W. Marsh
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.