Granted Patent
Utility
US 4,546,871 · App. 06/419,775
Gap maker
Inventor:
Billy M. Duke
Patented Case
View Patent ↗
Granted: Oct 15, 1985
Filed: Sep 20, 1982
Inventor
Billy M. Duke
Assignee (at issue)
HARRIS CORPORATION
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.