being double, reverse helix or interwoven

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CPC
H01J2201/2875

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HELECTRICITY H01Electric elements H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS H01J2201/00Electrodes common to discharge tubes

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H01J2201/2875being double, reverse helix or interwoven

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Patents Grantslast 30 patents

Information Patent Grant
Cathode ray tube having an improved indirectly heated cathode
- Patent number 6,492,768
- Issue date Dec 10, 2002
- Hitachi, Ltd.
- Sachio Koizumi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Indirectly-heated cathode heater structure for a cathode ray tube
- Patent number 5,453,657
- Issue date Sep 26, 1995
- Gold Star Co., Ltd.
- Gong S. Park
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents