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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0296321 (1994-08-25) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 12 인용 특허 : 0 |
A control device for folding and expanding a base portion of a playpen includes four block members each fixed on a base portion which is mounted on a mediate portion of the playpen and each pivotally engaged with one of four drive posts each of which is mounted on one of the four corners of the play
A control device for folding and expanding a base portion of a playpen which comprises four vertical stands (93) respectively mounted on four corners thereof and a base portion (20) mounted on an underside thereof, four drive posts (10) each having a first end pivotally connected to a lower end of a
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