Granted Patent
Utility
US 4,940,118 · App. 07/264,891
Slip assembly
Inventor:
Don C. Cox
Patented Case
View Patent ↗
Granted: Jul 10, 1990
Filed: Oct 31, 1988
Inventor
Don C. Cox
Assignee (at issue)
Otis Engineering 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.