Granted Patent
Utility
US 4,318,488 · App. 06/172,955
Method of extending a jib of a telescopic crane
Inventor:
Ram N. Rathi
Patented Case
View Patent ↗
Granted: Mar 9, 1982
Filed: Jul 28, 1980
Inventor
Ram N. Rathi
Assignee (at issue)
Harnischfeger 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.