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Koichi Sakai
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Fujisawa, JP
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last 30 patents
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Patent Grant
Auxiliary device for bicycle with traction roller type gear
Patent number
6,554,730
Issue date
Apr 29, 2003
NSK Ltd.
Koichi Sakai
B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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Patent Grant
Friction-roller speed changer
Patent number
5,931,759
Issue date
Aug 3, 1999
NSK Ltd.
Ryoichi Otaki
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...