Granted Patent
Utility
US 4,432,691 · App. 06/312,081
Pipe manipulator
Inventor:
Russell L. Sterner
Patented Case
View Patent ↗
Granted: Feb 21, 1984
Filed: Oct 16, 1981
Inventor
Russell L. Sterner
Assignee (at issue)
Kiddie, 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.