Granted Patent
Utility
US 4,506,614 · App. 06/512,833
Anti-jam thrust washer for sewing machine looptaker
Inventors:
Robert H. Larsen, Charles R. Odermann
Patented Case
View Patent ↗
Granted: Mar 26, 1985
Filed: Jul 11, 1983
Inventors
Robert H. Larsen
Charles R. Odermann
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.