Granted Patent
Utility
US 4,570,182 · App. 06/553,223
Halo generator for CRT display symbols
Inventors:
Michael J. Johnson, Hugh C. Hilburn
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: Nov 18, 1983
Inventors
Michael J. Johnson
Hugh C. Hilburn
Assignee (at issue)
Sperry Corp.
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.