19/05/18 22:38:32.57 fEe8boqB.net
おいおい、誤魔化すのもほどがある。特許を取っている会社はオカムラ製作所のほかざっと見たところ50社以上、山ほどあるだろうが！
URLﾘﾝｸ(patents.google.com)
一部コピペすれば、
US3197789A * 1961-07-17 1965-08-03 Joseph A Ashkouti Folding furniture
US3235308A 1964-07-27 1966-02-15 Flexible Air Seat Corp Adjustable seat apparatus
US3709559A 1971-03-22 1973-01-09 Rowland David L Furniture for seating people
CA1001966A 1972-04-03 1976-12-21 Clyde R. Porter Friction brake mechanism
CA975281A 1972-11-15 1975-09-30 Melvin A. Textoris Chair base
US4340250A 1976-09-29 1982-07-20 Minnesota Mining And Manufacturing Company Platform rocking chair springs
US4119343A 1977-01-17 1978-10-10 Kroehler Mfg. Co. Platform rocker structure
US4183494A 1978-11-13 1980-01-15 Trendler Metal Products, Inc. Swiveled leaf-spring undercarriage for rocking chair
US4411468A 1981-03-05 1983-10-25 Homecrest Industries Incorporated Rocking chair
DE3119399C2 1981-05-15 1986-04-10 Keiper Recaro Gmbh & Co, 7312 Kirchheim, De