Granted Patent
Utility
US 5,889,489 · App. 08/733,684
Diode receiver for radio frequency transponder
Inventors:
Daniel J. Friedman, Harley Heinrich
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Oct 17, 1996
Inventors
Daniel J. Friedman
Harley Heinrich
Assignee (at issue)
International Business Machines 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.