Granted Patent
Utility
US 4,521,790 · App. 06/453,534
Electrostatic printer of video pictures with grey tones
Inventor:
Emmanuel M. Allard
Patented Case
View Patent ↗
Granted: Jun 4, 1985
Filed: Dec 27, 1982
Inventor
Emmanuel M. Allard
Assignee (at issue)
Gould Inc.
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.