Granted Patent
Utility
US 4,345,649 · App. 06/184,674
Well packer
Inventors:
John L. Baugh, James W. Montgomery
Patented Case
View Patent ↗
Granted: Aug 24, 1982
Filed: Sep 5, 1980
Inventors
John L. Baugh
James W. Montgomery
Assignee (at issue)
Hughes Tool Company LLC
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.