-
1.Sound reproducing means and linking sound carrier means toy combination 失效
Title translation: 声音传播手段和连接声音载体手段组合公开(公告)号:US3477140A
公开(公告)日:1969-11-11
申请号:US3477140D
申请日:1967-02-23
Applicant: MATTEL INC
Inventor: RYAN JOHN W , ECHTERLING EUGENE J , GOLDEN MICHAEL E , GOETZ JOHN H , CHANG RICHARD SHIH-TENG
CPC classification number: G09B5/062
-
2.Educational toy device for audibly reproducing recorded teaching material 失效
Title translation: 用于录制教学材料的教育玩具设备公开(公告)号:US3491461A
公开(公告)日:1970-01-27
申请号:US3491461D
申请日:1967-02-09
Applicant: MATTEL INC
Inventor: ECHTERLING EUGENE J
CPC classification number: G09B5/062
-