Granted Patent
Utility
US 4,477,782 · App. 06/495,063
Compound current mirror
Inventor:
Eric J. Swanson
Patented Case
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Granted: Oct 16, 1984
Filed: May 13, 1983
Inventor
Eric J. Swanson
Assignee (at issue)
AT&T Bell Laboratories
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.