Granted Patent
Utility
US 4,326,584 · App. 06/174,946
Kelly packing and stripper seal protection element
Inventor:
Bruce J. Watkins
Patented Case
View Patent ↗
Granted: Apr 27, 1982
Filed: Aug 4, 1980
Inventor
Bruce J. Watkins
Assignee (at issue)
Regan Offshore International, 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.