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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0903873 (1978-05-08) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 23 인용 특허 : 1 |
A device for holding the feet of a person doing “sit-up”exercises has a U-shaped base to receive the bottom margin of a door, a head section provided with laterally spaced foot retainers and a connecting section outwardly and upwardly inclined to space the head away from the door. The head is rearwa
A device for use in performing sit-up exercies, said device including a head means for receiving feet of a user, a pair of laterally spaced supports carried by said head means, one support for supporting each foot of a user, each support including a support surface engageable by the ball area of the
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