Granted Patent
Utility
US 5,145,228 · App. 07/625,889
Running and pulling tool
Inventor:
Colin Scott Boyle
Patented Case
View Patent ↗
Granted: Sep 8, 1992
Filed: Dec 11, 1990
Inventor
Colin Scott Boyle
Assignee (at issue)
Otis Engineering 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.