Granted Patent
Utility
US 4,728,817 · App. 07/012,774
Power transistor drive circuit
Inventors:
Ralph D. Jessee, Joseph M. Urish
Patented Case
View Patent ↗
Granted: Mar 1, 1988
Filed: Feb 9, 1987
Inventors
Ralph D. Jessee
Joseph M. Urish
Assignee (at issue)
Westinghouse Electric 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.