Granted Patent
Utility
US 4,426,667 · App. 05/906,850
Pulse width modulation system
Inventors:
Dale P. Masher, Leonard J. Chaitin
Patented Case
View Patent ↗
Granted: Jan 17, 1984
Filed: May 17, 1978
Inventors
Dale P. Masher
Leonard J. Chaitin
Assignee (at issue)
Savin 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.