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Takao Kawamura
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Chiba, JP
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last 30 patents
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Patent Grant
Cathode ray tube having a small-diameter neck and method of manufac...
Patent number
6,246,161
Issue date
Jun 12, 2001
Hitachi, Ltd.
Takao Kawamura
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Image display panel having antistatic film with transparent and ele...
Patent number
RE37183
Issue date
May 22, 2001
Hitachi, Ltd.
Hiromitsu Kawamura
313 - Electric lamp and discharge devices
Information
Patent Grant
Color cathode-ray tube (CRT) and method of producing the same
Patent number
6,140,757
Issue date
Oct 31, 2000
Hitachi, Ltd.
Hiromitsu Kawamura
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Transparent plate, process for the production thereof and their app...
Patent number
5,880,557
Issue date
Mar 9, 1999
Hitachi, Ltd.
Yoshishige Endo
G02 - OPTICS
Information
Patent Grant
Cathode ray tube having a small-diameter neck and method of manufac...
Patent number
5,818,155
Issue date
Oct 6, 1998
Hitachi, Ltd.
Takao Kawamura
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Ultrafine particle film, process for producing the same, transparen...
Patent number
5,742,118
Issue date
Apr 21, 1998
Hitachi, Ltd.
Yoshishige Endo
G02 - OPTICS
Information
Patent Grant
Process for forming ultrafine particle film, transparent plate and...
Patent number
5,707,685
Issue date
Jan 13, 1998
Hitachi, Ltd.
Yoshishige Endou
G02 - OPTICS
Information
Patent Grant
Ultra fine particles having uneven surfaces and treatment plate usi...
Patent number
5,612,128
Issue date
Mar 18, 1997
Hitachi, Ltd.
Yoshishige Endo
G02 - OPTICS
Information
Patent Grant
Color cathode ray tube having improved slot type shadow mask
Patent number
5,523,647
Issue date
Jun 4, 1996
Hitachi, Ltd.
Takao Kawamura
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Ultrafine particles, their production process and their use
Patent number
5,396,148
Issue date
Mar 7, 1995
Hitachi, Ltd.
Yoshishige Endo
G02 - OPTICS
Information
Patent Grant
Cathode-ray tube
Patent number
5,291,097
Issue date
Mar 1, 1994
Hitachi, Ltd.
Hiromitsu Kawamura
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
Ultrafine particles for use in a cathode ray tube or an image displ...
Patent number
5,189,337
Issue date
Feb 23, 1993
Hitachi, Ltd.
Yoshishige Endo
G02 - OPTICS
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
Antistatic cathode ray tube with lobe like projections and high glo...
Patent number
5,122,709
Issue date
Jun 16, 1992
Hitachi, Ltd.
Takao Kawamura
G02 - OPTICS
Information
Patent Grant
Image display panel having antistatic film with transparent and ele...
Patent number
4,945,282
Issue date
Jul 31, 1990
Hitachi, Ltd.
Hiromitsu Kawamura
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Cathode device for cathode-ray tube
Patent number
4,337,412
Issue date
Jun 29, 1982
Hitachi, Ltd.
Takao Kawamura
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Electron tube cathode
Patent number
4,291,252
Issue date
Sep 22, 1981
Hitachi, Ltd.
Toshiyuki Aida
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Oxide cathode and process for production thereof
Patent number
4,273,683
Issue date
Jun 16, 1981
Hitachi, Ltd.
Takao Kawamura
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Direct-heated cathode structure
Patent number
4,251,746
Issue date
Feb 17, 1981
Hitachi, Ltd.
Takao Kawamura
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Directly heated cathode for electron tube
Patent number
4,220,891
Issue date
Sep 2, 1980
Hitachi, Ltd.
Hisashi Ando
H01 - BASIC ELECTRIC ELEMENTS