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) | H05B-003/36 |
미국특허분류(USC) | 219/212 ; 219/529 ; 219/549 |
출원번호 | US-0483672 (1990-02-23) |
발명자 / 주소 | |
출원인 / 주소 | |
인용정보 | 피인용 횟수 : 19 인용 특허 : 9 |
An electric heating element which includes two sets of adjacent electrically conductive wires electrically insulated from each other. By adjacent is meant that the two sets of wires are placed as close to each other as is possible without electrically connecting the two wires; for example, the wires are preferably within 2 to 4 millimeters of each other. One set of wires is constructed and arranged to carry electric current in a first direction through the heating element. The other set of wires is constructed and arranged in a parallel circuit to the fi...
An electric heating element comprising a power source having two oppositely charged terminals and two sets of adjacent electrically conductive wires electrically insulated from each other, the ends of a first set of said wires being attached to said two terminals of said power source and constructed and arranged to carry electric current in a first direction through said heating element, a second set being attached in opposite polarity to said two terminals of said power source and being constructed and arranged in a parallel electrical circuit with resp...