Granted Patent
Utility
US 5,633,940 · App. 08/639,810
Audio amplifier arrangement
Inventor:
Derk J. C. Wassink
Patented Case
View Patent ↗
Granted: May 27, 1997
Filed: Apr 29, 1996
Inventor
Derk J. C. Wassink
Assignee (at issue)
U.S. Philips 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.