Granted Patent
Utility
US 6,027,390 · App. 09/001,008
Frit-sealing apparatus for cathode-ray tube
Inventors:
Hiroshi Koizumi, Hiroshi Okuda
Patented Case
View Patent ↗
Granted: Feb 22, 2000
Filed: Dec 30, 1997
Inventors
Hiroshi Koizumi
Hiroshi Okuda
Assignee (at issue)
MITSUBISHI 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.