Granted Patent
Utility
US 4,497,597 · App. 06/411,583
Cribbing
Inventor:
Nicholas Chlumecky
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: Aug 25, 1982
Inventor
Nicholas Chlumecky
Assignee (at issue)
Commercial Shearing, Inc.
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.