Inventor · disambiguated record
Ryokichi Yamazaki
Also filed as: YAMAZAKI RYOKICHI
13 granted patents·410 citations·filing 1989–1998
94Inventor score
Top patents by PatentIndex Score
13 records- 0194US6055780ARetractable stairs-like standKOTOBUKI CORP·Filed 1998·Granted May 2, 2000·95 cites·17 claims
- 0280US6000174ARetractable stairs-like standKOTOBUKI CORP·Filed 1998·Granted Dec 14, 1999·50 cites·16 claims
- 0380US5087096AApparatus for displacing extensible/contractible board for chair in case of emergencyKOTOBUKI & CO LTD·Filed 1990·Granted Feb 11, 1992·61 cites·9 claims
- 0472USD396967SSeating unitKOTOBUKI CORP·Filed 1997·Granted Aug 18, 1998·17 cites·1 claims
- 0572US5328238ALayable seatKOTOBUKI CORP·Filed 1992·Granted Jul 12, 1994·36 cites·8 claims
- 0670USD352400SFolding chair unitKK KOTOBUKI·Filed 1992·Granted Nov 15, 1994·15 cites·1 claims
- 0764US5803546ATurning mechanism for chair seatKOTOBUKI & CO LTD·Filed 1997·Granted Sep 8, 1998·35 cites·8 claims
- 0863USD370791SFolding chair unitKK KOTOBUKI·Filed 1995·Granted Jun 18, 1996·13 cites·1 claims
- 0953US5328239AFlip-up type seatKOTOBUKI CORP·Filed 1992·Granted Jul 12, 1994·23 cites·1 claims
- 1047USRE37043ELayable seatKOTOBUKI CORP·Filed 1996·Granted Feb 6, 2001·17 cites·26 claims
- 1146US5685608AFolding seat and seating system having folding seatKOTOBUKI CORP·Filed 1996·Granted Nov 11, 1997·19 cites·9 claims
- 1245US5700052AChair for an acoustically designed buildingYAMAHA CORP·Filed 1995·Granted Dec 23, 1997·16 cites·10 claims
- 1338US4932718ACoupled chair unit convertible to a chair mode and to a desk modeKOTOBUKI SEATING COMPANY LTD·Filed 1989·Granted Jun 12, 1990·13 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →