Granted Patent
Utility
US 4,428,312 · App. 06/506,757
Loop positioning arrangement for double pointed looper sewing machine
Inventor:
Stanley J. Ketterer
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Jun 22, 1983
Inventor
Stanley J. Ketterer
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.