Granted Patent
Utility
US 4,233,544 · App. 06/037,586
Input-keep alive arrangement for plasma charge transfer device
Inventor:
William E. Coleman
Patented Case
View Patent ↗
Granted: Nov 11, 1980
Filed: May 9, 1979
Inventor
William E. Coleman
Assignee (at issue)
NCR 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.