Granted Patent
Utility
US 4,385,576 · App. 06/319,169
Presser foot and shank design (snap-on)
Inventor:
Walter H. W. Marsh
Patented Case
View Patent ↗
Granted: May 31, 1983
Filed: Nov 9, 1981
Inventor
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.