Granted Patent
Utility
US 4,808,909 · App. 07/108,745
Bias voltage and constant current supply circuit
Inventor:
Dennis N. Eddlemon
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Oct 15, 1987
Inventor
Dennis N. Eddlemon
Assignee (at issue)
APEX MICROTECHNOLOGY, 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.