Granted Patent
Utility
US 4,137,981 · App. 05/853,275
Pivot shaft roller frame support
Inventor:
Francis J. Halterman, Jr.
Patented Case
View Patent ↗
Granted: Feb 6, 1979
Filed: Nov 21, 1977
Inventor
Francis J. Halterman, Jr.
Assignee (at issue)
General Motors LLC
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.