Granted Patent
Utility
US 4,481,897 · App. 06/505,009
Clutching arrangement for a sewing machine bobbin
Inventors:
Charles R. Odermann, Robert H. Larsen
Patented Case
View Patent ↗
Granted: Nov 13, 1984
Filed: Jun 16, 1983
Inventors
Charles R. Odermann
Robert H. Larsen
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.