Granted Patent
Utility
US 6,590,987 · App. 09/764,842
Two-wired hearing aid system utilizing two-way communication for programming
Inventor:
David J. Delage
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Jan 17, 2001
Inventor
David J. Delage
Assignee (at issue)
ETYMOTIC RESEARCH, 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.