Granted Patent
Utility
US 4,545,846 · App. 06/644,369
Envelope gumbox friction brake and safety slip clutch
Inventors:
Harold R. Lillibridge, Joseph D. Russo
Patented Case
View Patent ↗
Granted: Oct 8, 1985
Filed: Aug 27, 1984
Inventors
Harold R. Lillibridge
Joseph D. Russo
Assignee (at issue)
Champion International Corporation 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.