Granted Patent
Utility
US 4,834,175 · App. 07/245,654
Hydraulic versa-trieve packer
Inventors:
Colby M. Ross, Pat M. White
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Sep 15, 1988
Inventors
Colby M. Ross
Pat M. White
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.