검색연산자 | 기능 | 검색시 예 |
---|---|---|
() | 우선순위가 가장 높은 연산자 | 예1) (나노 (기계 | machine)) |
공백 | 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 | 예1) (나노 기계) 예2) 나노 장영실 |
| | 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 | 예1) (줄기세포 | 면역) 예2) 줄기세포 | 장영실 |
! | NOT 이후에 있는 검색어가 포함된 문서는 제외 | 예1) (황금 !백금) 예2) !image |
* | 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 | 예) semi* |
"" | 따옴표 내의 구문과 완전히 일치하는 문서만 검색 | 예) "Transform and Quantization" |
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) | A63B-021/02 |
미국특허분류(USC) | 272/137 ; 272/68 |
출원번호 | US-0525256 (1990-05-17) |
발명자 / 주소 | |
인용정보 | 피인용 횟수 : 18 인용 특허 : 0 |
An abdominal exerciser (20) having a relatively flat base member (60) and a centrally contoured outer member (70) with a sufficeint recess to receive the bony protuberances of the user\s spine on one method of operation and the fingertips of both hands in a second method of operation. The members are pivotally connected at one end and a V-shaped opening can be formed at the opposite end by disposing a pivotally moving spring (40) between the members. Additionally, in one embodiment, a resistance measuring gauge (50) can be attached to the base member (60...
A method for enabling a user to directly exercise his or her abdominal muscles, comprising the following steps: providing an exercise device comprising a base member adapted to engage a stable surface, an outer member adapted to be applied against said user\s low back, a hinge means pivotally connecting said members, and a resilient means disposed between said members and positioned so as to urge said members apart, such that said members form a generally V-shaped opening when so urged apart, said base member and said outer member each having an internal...