Granted Patent
Utility
US 5,159,280 · App. 07/666,359
True logarithmic amplifier having a variable gain amplifier
Inventor:
Peter Edward Chadwick
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: Mar 8, 1991
Inventor
Peter Edward Chadwick
Assignee (at issue)
The General Electric Company, p.l.c.
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.