Granted Patent
Utility
US 4,595,974 · App. 06/649,071
Base drive circuit for a switching power transistor
Inventor:
Patrice Lethellier
Patented Case
View Patent ↗
Granted: Jun 17, 1986
Filed: Sep 10, 1984
Inventor
Patrice Lethellier
Assignee (at issue)
Burroughs, Inc.
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.