Granted Patent
Utility
US 4,363,509 · App. 06/232,845
Chain grab hook providing for a flat lay cross-over link
Inventor:
Kenneth D. Schreyer
Patented Case
View Patent ↗
Granted: Dec 14, 1982
Filed: Feb 9, 1981
Inventor
Kenneth D. Schreyer
Assignee (at issue)
Columbus McKinnon 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.