Granted Patent
Utility
US 4,409,902 · App. 06/255,647
Spike drivers
Inventor:
Earl E. Frank
Patented Case
View Patent ↗
Granted: Oct 18, 1983
Filed: Apr 20, 1981
Inventor
Earl E. Frank
Assignee (at issue)
Abex 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.