Granted Patent
Utility
US 4,307,167 · App. 06/126,912
Layered electrophotographic plate having tetramethyl benzidene based disazo dye
Inventors:
Larry D. Bowden, Robert B. Champ, Michael Thomas Moore
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Mar 3, 1980
Inventors
Larry D. Bowden
Robert B. Champ
Michael Thomas Moore
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.