Sumio Soya

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Additive for heat-sensitive recording material, the recording mater...
- Patent number 5,032,567
- Issue date Jul 16, 1991
- Showa Denko K.K.
- Akihiro Ohtsubo
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
3-substituted hydantoins
- Patent number 4,939,269
- Issue date Jul 3, 1990
- Showa Denko K.K.
- Akihiro Ohtsubo
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS