Yoshifumi Tsujimoto

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Ibaraki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Non-aqueous electrolyte battery separator
- Patent number 6,447,958
- Issue date Sep 10, 2002
- Sumitomo Chemical Co., Ltd.
- Yasuo Shinohara
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Prepreg process for producing the same and printed circuit substrat...
- Patent number 6,033,765
- Issue date Mar 7, 2000
- Sumitomo Chemical Company, Limited
- Tsutomu Takahashi
- B32 - LAYERED PRODUCTS
Information Patent Grant
Para-oriented aromatic polyamide porous film
- Patent number 5,856,426
- Issue date Jan 5, 1999
- Sumitomo Chemical Company, Limited
- Tsutomu Takahashi
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Prepreg, process for producing the same and printed circuit substra...
- Patent number 5,851,646
- Issue date Dec 22, 1998
- Sumitomo Chemical Company, Limited
- Tsutomu Takahashi
- B32 - LAYERED PRODUCTS