Yamazaki; Ryokichi
Patent Applications and Registrations
Patent applications and USPTO patent grants for Yamazaki; Ryokichi.The latest application filed is for "layable seat".
- Yamazaki; Ryokichi - Tokyo JP
- Yamazaki; Ryokichi - Chiba JP
| Patent | Date |
|---|---|
| Layable seat Grant RE37,043 - Yamazaki February 6, 2 | 2001-02-06 |
| Retractable stairs-like stand Grant 6,055,780 - Yamazaki May 2, 2 | 2000-05-02 |
| Retractable stairs-like stand Grant 6,000,174 - Yamazaki December 14, 1 | 1999-12-14 |
| Turning mechanism for chair seat Grant 5,803,546 - Yamazaki September 8, 1 | 1998-09-08 |
| Chair for an acoustically designed building Grant 5,700,052 - Yamazaki , et al. December 23, 1 | 1997-12-23 |
| Folding chair unit Grant D352,400 - Yamazaki November 15, 1 | 1994-11-15 |
| Layable seat Grant 5,328,238 - Yamazaki July 12, 1 | 1994-07-12 |
| Flip-up type seat Grant 5,328,239 - Yamazaki July 12, 1 | 1994-07-12 |
| Apparatus for displacing extensible/contractible board for chair in case of emergency Grant 5,087,096 - Yamazaki February 11, 1 | 1992-02-11 |
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