Granted Patent
Utility
US 5,007,330 · App. 07/452,207
Rotary actuator and seal assembly for use therein
Inventors:
William B. Scobie, Robert A. Frenzel
Patented Case
View Patent ↗
Granted: Apr 16, 1991
Filed: Dec 18, 1989
Inventors
William B. Scobie
Robert A. Frenzel
Assignee (at issue)
Keystone International
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.