Granted Patent
Utility
US 4,385,293 · App. 06/101,659
Gray shade operation of a large AC plasma display panel
Inventor:
Robert E. Wisnieff
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Dec 10, 1979
Inventor
Robert E. Wisnieff
Assignee (at issue)
UNITED TECHNOLOGIES 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.