Granted Patent
Utility
US 4,420,177 · App. 06/161,632
Knotters
Inventors:
James A. Munro, Marc G. Vansteelant
Patented Case
View Patent ↗
Granted: Dec 13, 1983
Filed: Jun 20, 1980
Inventors
James A. Munro
Marc G. Vansteelant
Assignee (at issue)
Sperry Corp.
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.