Granted Patent
Utility
US 4,422,397 · App. 06/299,243
Needle thread wiping device
Inventors:
Reinhold Papajewski, Lothar Reinfurth
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Sep 3, 1981
Inventors
Reinhold Papajewski
Lothar Reinfurth
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.