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CPC
H01J2231/5013
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Parent Industries
H
ELECTRICITY
H01
Electric elements
H01J
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J2231/00
Cathode ray tubes or electron beam tubes
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H01J2231/5013
with secondary emission electrodes
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Patents Grants
last 30 patents
Information
Patent Grant
X-ray fluorograph and radiograph apparatus for obtaining X-ray imag...
Patent number
5,353,325
Issue date
Oct 4, 1994
Hitachi Medical Corporation
Ken Ueda
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Infrared converter
Patent number
4,914,296
Issue date
Apr 3, 1990
The Boeing Company
Ralph R. Reinhold
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Spatial light modulator
Patent number
4,717,893
Issue date
Jan 5, 1988
Hamamatsu Photonics Kabushiki Kaisha
Yoshiharu Ooi
G02 - OPTICS
Information
Patent Grant
3736459
Patent number
3,736,459
Issue date
May 29, 1973
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
3657596
Patent number
3,657,596
Issue date
Apr 18, 1972
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents