Granted Patent
Utility
US 4,947,431 · App. 07/406,900
Held music history circuit
Inventors:
Richard Stroud, Fred J. Anderson, Matthew C. Reprogle, Douglas E. White, Jeffrey J. Marrah, Gregory J. Manlove
Patented Case
View Patent ↗
Granted: Aug 7, 1990
Filed: Sep 13, 1989
Inventors
Richard Stroud
Fred J. Anderson
Matthew C. Reprogle
Douglas E. White
Jeffrey J. Marrah
Gregory J. Manlove
Assignee (at issue)
DELCO ELECTRONICS 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.