Yukiko Ryu

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Thermally sensitive recording medium
- Patent number 6,440,897
- Issue date Aug 27, 2002
- Nippon Paper Industries Co Ltd
- Yukiko Ryu
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Phenanthridine derivatives and metal complexes thereof used for tra...
- Patent number 5,919,928
- Issue date Jul 6, 1999
- Nippon Paper Industries, Co., Ltd.
- Reiji Ohashi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Acridine derivative metal complexes used for transparent recording...
- Patent number 5,892,042
- Issue date Apr 6, 1999
- Nippon Paper Industries Co., Ltd.
- Reiji Ohashi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Acridine derivatives and metal complexes thereof used for transpare...
- Patent number 5,792,863
- Issue date Aug 11, 1998
- Nippon Paper Industries Co., Ltd.
- Reiji Ohashi
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
Bulky flexible paper and process for producing the same
- Publication number 20040040681
- Publication date Mar 4, 2004
- Reiji Ohashi
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE