Granted Patent
Utility
US 4,304,433 · App. 06/130,761
Pipe gripping head
Inventor:
Faustyn C. Langowski
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: Mar 17, 1980
Inventor
Faustyn C. Langowski
Assignee (at issue)
BJ-Hughes 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.