Granted Patent
Utility
US 4,043,813 · App. 05/594,150
Photoconductive particles of zinc oxide
Inventors:
Daniel R. Logue, Terry G. Anderson
Patented Case
View Patent ↗
Granted: Aug 23, 1977
Filed: Jul 7, 1975
Inventors
Daniel R. Logue
Terry G. Anderson
Assignee (at issue)
Bell and Howell, LLC
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.