Granted Patent
Utility
US 6,646,502 · App. 10/212,904
Digital-input class-D amplifier
Inventor:
Marinus Wilhelmus Kruiskamp
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Aug 6, 2002
Inventor
Marinus Wilhelmus Kruiskamp
Assignee (at issue)
NATIONAL SEMICONDUCTOR 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.