Granted Patent
Utility
US 4,453,480 · App. 06/512,849
Thread tensioning module for a sewing machine
Inventors:
Robert H. Larsen, Anthony Giaimo
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Jul 11, 1983
Inventors
Robert H. Larsen
Anthony Giaimo
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.