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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0013032 (1993-02-03) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 9 인용 특허 : 0 |
A toy or display suspends a ball in mid-air and moves the ball in a closed path without any visible means of support above a housing. The ball is moved radially toward, and alternately away from, a central housing axis, and may also be raised and lowered in elevation during its travel along the path
An action apparatus comprising: (a) a housing having an upright housing axis, a base and an annular track mounted on the base, said track having at least one rail of variable undulating height as considered in a circumferential direction around the track; (b) an element; (c) means in the housing for
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