Granted Patent
Utility
US 4,170,740 · App. 05/880,833
High voltage switch and capacitive drive
Inventor:
Joseph Pernyeszi
Patented Case
View Patent ↗
Granted: Oct 9, 1979
Filed: Feb 24, 1978
Inventor
Joseph Pernyeszi
Assignee (at issue)
International Telephone and Telegraph 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.