Granted Patent
Utility
US 5,277,463 · App. 08/001,887
Drill pipe handling tool
Inventors:
Mohinder Singh, Edward A. Szep
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Jan 8, 1993
Inventors
Mohinder Singh
Edward A. Szep
Assignee (at issue)
Ingersoll-Rand 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.