Granted Patent
Utility
US 4,433,529 · App. 06/430,015
Torsion spring coupled drive mechanism for reciprocating device having hazard warning means
Inventors:
Warren E. Herwig, Tony L. Kaminski, Paul T. Shupert
Patented Case
View Patent ↗
Granted: Feb 28, 1984
Filed: Sep 30, 1982
Inventors
Warren E. Herwig
Tony L. Kaminski
Paul T. Shupert
Assignee (at issue)
Allis-Chalmers 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.