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Patent applications and USPTO patent grants for Hayama; Hiroyuki.The latest application filed is for "damping force adjustable fluid pressure shock absorber".
Patent | Date |
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Fluid pressure shock absorber Grant 8,544,619 - Yamaguchi , et al. October 1, 2 | 2013-10-01 |
Damping force adjustable fluid pressure shock absorber Grant 7,757,826 - Hayama , et al. July 20, 2 | 2010-07-20 |
Damping force adjustable fluid pressure shock absorber App 20090272611 - Hayama; Hiroyuki ;   et al. | 2009-11-05 |
Fluid pressure shock absorber App 20080257668 - Yamaguchi; Hiroyuki ;   et al. | 2008-10-23 |
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