Granted Patent
Utility
US 4,365,567 · App. 05/921,033
Modified thread control lever for a bobbin case
Inventor:
Ludwig J. Kuhar
Patented Case
View Patent ↗
Granted: Dec 28, 1982
Filed: Jun 30, 1978
Inventor
Ludwig J. Kuhar
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.