Masaharu Kumada

Person

Mobara-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Method of producing a cathode ray tube
- Patent number 6,346,291
- Issue date Feb 12, 2002
- Hitachi, Ltd.
- Noriharu Matsudate
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Cathode ray tube having bismuth oxide layer on color selective elec...
- Patent number 6,246,163
- Issue date Jun 12, 2001
- Hitachi, Ltd.
- Noriharu Matsudate
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Cathode ray tube having reduced doming effect
- Patent number 5,814,928
- Issue date Sep 29, 1998
- Hitachi, Ltd.
- Noriharu Matsudate
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Shadow-mask type color cathode-ray tube
- Patent number 5,216,321
- Issue date Jun 1, 1993
- Hitachi, Ltd.
- Takao Kawamura
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Implosion-protected cathode-ray tube
- Patent number 5,138,461
- Issue date Aug 11, 1992
- Hitachi Ltd.
- Takao Kawamura
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of producing shadow mask of color cathode ray tube
- Patent number 4,872,924
- Issue date Oct 10, 1989
- Hitachi, Ltd.
- Masaharu Kumada
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Impregnated cathode having cathode base body and refractory metal s...
- Patent number 4,833,361
- Issue date May 23, 1989
- Hitachi, Ltd.
- Yukio Suzuki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Solar battery using amorphous silicon
- Patent number 4,543,441
- Issue date Sep 24, 1985
- Hitachi, Ltd.
- Masaharu Kumada
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Photovoltaic-storage battery device
- Patent number 4,481,265
- Issue date Nov 6, 1984
- Hitachi, Ltd.
- Masayoshi Ezawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Directly heated oxide cathode and production thereof
- Patent number 4,446,404
- Issue date May 1, 1984
- Hitachi, Ltd.
- Masaharu Kumada
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Directly heated type oxide cathode
- Patent number 4,382,206
- Issue date May 3, 1983
- Hitachi, Ltd.
- Masaharu Kumada
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Base metal plate materials for directly heated oxide cathodes
- Patent number 4,222,775
- Issue date Sep 16, 1980
- Hitachi, Ltd.
- Akira Misumi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Nickel alloy base metal plate for directly heated oxide cathodes
- Patent number 4,208,208
- Issue date Jun 17, 1980
- Hitachi, Ltd.
- Akira Misumi
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Base metal plate materials for directly heated oxide cathode
- Patent number 4,146,393
- Issue date Mar 27, 1979
- Hitachi, Ltd.
- Akira Misumi
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Method of producing a cathode ray tube
- Publication number 20010024689
- Publication date Sep 27, 2001
- Noriharu Matsudate
- H01 - BASIC ELECTRIC ELEMENTS

Masaharu Kumada

Person

Patents Grantslast 30 patents

Method of producing a cathode ray tube

Cathode ray tube having bismuth oxide layer on color selective elec...

Cathode ray tube having reduced doming effect

Shadow-mask type color cathode-ray tube

Implosion-protected cathode-ray tube

Method of producing shadow mask of color cathode ray tube

Impregnated cathode having cathode base body and refractory metal s...

Solar battery using amorphous silicon

Photovoltaic-storage battery device

Directly heated oxide cathode and production thereof

Directly heated type oxide cathode

Base metal plate materials for directly heated oxide cathodes

Nickel alloy base metal plate for directly heated oxide cathodes

Base metal plate materials for directly heated oxide cathode

Patents Applicationslast 30 patents

Method of producing a cathode ray tube