Granted Patent
Utility
US 4,397,250 · App. 06/294,854
Thread controlling arrangement for bobbin winding mechanism
Inventors:
Thaddeus J. Zylbert, Herbert T. Hurler
Patented Case
View Patent ↗
Granted: Aug 9, 1983
Filed: Aug 20, 1981
Inventors
Thaddeus J. Zylbert
Herbert T. Hurler
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.