Granted Patent
Utility
US 6,147,558 · App. 09/292,760
Attenuating volume control
Inventor:
Terry Lee Sculley
Patented Case
View Patent ↗
Granted: Nov 14, 2000
Filed: Apr 14, 1999
Inventor
Terry Lee Sculley
Assignee (at issue)
ESS TECH, 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.