Isao Obara

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Kamakura, JP

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Patents Grantslast 30 patents

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Surface-protecting film and resin-sealed semiconductor device havin...
- Patent number 6,200,831
- Issue date Mar 13, 2001
- Hitachi, Ltd.
- Jun Tanaka
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Surface-protecting film and resin-sealed semiconductor device havin...
- Patent number 6,087,006
- Issue date Jul 11, 2000
- Hitachi, Ltd.
- Jun Tanaka
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Semiconductor device
- Patent number 4,736,012
- Issue date Apr 5, 1988
- Hitachi, Ltd.
- Fusaji Shoji
- H01 - BASIC ELECTRIC ELEMENTS
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Light-sensitive polymer composition with poly(amic acid), bisazide,...
- Patent number 4,565,767
- Issue date Jan 21, 1986
- Hitachi, Ltd.
- Fumio Kataoka
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Radiation-sensitive poly(amic acid) polymer composition
- Patent number 4,451,551
- Issue date May 29, 1984
- Hitachi, Ltd.
- Fumio Kataoka
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Spider of loudspeaker
- Patent number 4,239,944
- Issue date Dec 16, 1980
- Hitachi, Ltd.
- Isao Obara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE