Granted Patent
Utility
US 6,548,950 · App. 09/782,208
Cathode ray tube having shadow mask with slit between apertures
Inventors:
Hiroshi Kobayashi, Masayuki Ohmori, Yoshikazu Demi
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Feb 13, 2001
Inventors
Hiroshi Kobayashi
Masayuki Ohmori
Yoshikazu Demi
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, LTD.
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.