Ryota Morikawa

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Yoshikawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Windup spring drive unit
- Patent number 6,746,302
- Issue date Jun 8, 2004
- Seikoken Kabushiki Kaisha
- Ryota Morikawa
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Pull-back windup type spring drive unit
- Patent number 5,638,922
- Issue date Jun 17, 1997
- Seikoken Kabushiki Kaisha
- Ryota Morikawa
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Spring drive unit of pull-back windup type
- Patent number 5,103,936
- Issue date Apr 14, 1992
- Seikoken Kabushiki Kaisha
- Ryota Morikawa
- A63 - SPORTS GAMES AMUSEMENTS