Granted Patent
Utility
US 6,628,791 · App. 09/430,078
Signal derived bias supply for electrostatic loudspeakers
Inventors:
Jeevan G. Bank, James J. Croft, III
Patented Case
View Patent ↗
Granted: Sep 30, 2003
Filed: Oct 29, 1999
Inventors
Jeevan G. Bank
James J. Croft, III
Assignee (at issue)
American Technology 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.