Granted Patent
Utility
US 4,518,829 · App. 06/596,179
Two terminal microphone active load gain regulation circuit
Inventor:
Eduard F. B. Boeckmann
Patented Case
View Patent ↗
Granted: May 21, 1985
Filed: Apr 2, 1984
Inventor
Eduard F. B. Boeckmann
Assignee (at issue)
GTE Communication Systems 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.