Granted Patent
Utility
US 5,101,418 · App. 07/256,420
Digital time-multiplexed quadrature frequency upconverter
Inventors:
David N. Critchlow, Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana, Gregory L. Westling, Eric Paneth, Moshe Yehushua
Patented Case
View Patent ↗
Granted: Mar 31, 1992
Filed: Oct 12, 1988
Inventors
David N. Critchlow
Graham M. Avis
Sandra J. K. Earlam
Karle J. Johnson
Bruce A. Smetana
Gregory L. Westling
Eric Paneth
Moshe Yehushua
Assignee (at issue)
International Mobile 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.