Granted Patent
Utility
US 5,141,053 · App. 07/707,689
Compact dual packer with locking dogs
Inventors:
Henry L. Restarick, Pat M. White
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: May 30, 1991
Inventors
Henry L. Restarick
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.