Granted Patent
Utility
US 4,955,059 · App. 07/330,248
Speaker power matching method and apparatus
Inventor:
Harold W. Mech
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Mar 29, 1989
Inventor
Harold W. Mech
Assignee (at issue)
Motorola, 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.