Granted Patent
Utility
US 4,934,897 · App. 07/314,871
Pipe-moving apparatus
Inventors:
Ronald L. Anderson, John Kinney
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Feb 23, 1989
Inventors
Ronald L. Anderson
John Kinney
Assignee (at issue)
J. I. Case Company
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.