Granted Patent
Utility
US 4,642,529 · App. 06/713,127
Apparatus and method for measuring linewidth and convergence in a color cathode ray tube display system
Inventor:
Cecil W. Penn
Patented Case
View Patent ↗
Granted: Feb 10, 1987
Filed: Mar 18, 1985
Inventor
Cecil W. Penn
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.