Sadao Sekiguchi

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Minoo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Color developing sheet for pressure-sensitive recording systems
- Patent number 4,257,935
- Issue date Mar 24, 1981
- Sumitomo Naugatuck Co., Ltd.
- Sadao Sekiguchi
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Color developing sheet with organic developer and latex binder
- Patent number 4,125,675
- Issue date Nov 14, 1978
- Sumitomo Naugatuck Co., Ltd.
- Sadao Sekiguchi
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS