Granted Patent
Utility
US 4,822,000 · App. 07/088,576
Eccentric segmented ball valves
Inventor:
John W. Bramblet
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Aug 24, 1987
Inventor
John W. Bramblet
Assignee (at issue)
Rockford Controls 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.