Granted Patent
Utility
US 4,323,743 · App. 06/105,083
Means for operating blast valve in two-pressure circuit breaker
Inventor:
Henry L. Peek
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Dec 19, 1979
Inventor
Henry L. Peek
Assignee (at issue)
Siemens-Allis
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.