Granted Patent
Utility
US 4,551,748 · App. 06/467,121
Measuring head for determining the color purity and the convergence in a color picture tube
Inventor:
Hans P. Mattle
Patented Case
View Patent ↗
Granted: Nov 5, 1985
Filed: Feb 16, 1983
Inventor
Hans P. Mattle
Assignee (at issue)
International Standard Electric 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.