Granted Patent
Utility
US 4,768,091 · App. 07/110,251
Testing apparatus for displaying scanning beam spot size and line focus on a CRT video screen
Inventors:
Robert E. Pooler, William R. Kaylor
Patented Case
View Patent ↗
Granted: Aug 30, 1988
Filed: Oct 19, 1987
Inventors
Robert E. Pooler
William R. Kaylor
Assignee (at issue)
North American Philips 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.