Granted Patent
Utility
US 4,538,793 · App. 06/615,010
Dual claw spike puller
Inventors:
Andrew M. Dieringer, Ervin M. Sheperd
Patented Case
View Patent ↗
Granted: Sep 3, 1985
Filed: May 29, 1984
Inventors
Andrew M. Dieringer
Ervin M. Sheperd
Assignee (at issue)
REXNORD GMBH
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.