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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
|
출원번호 | US-0775501 (1991-10-15) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 42 인용 특허 : 0 |
A folding warning marker includes three tubular stays each having first upper ends joined together by torsional coil springs. A flexible, brightly colored and reflective fabric cover is received over the stays. The torsional coil springs bias each adjacent pair of the three stays apart, forming isos
A folding warning marker, comprising: a plurality of elongated tubular stays; means securing first ends of said stays and urging said stays apart comprising at least one torsional coil spring having opposite free ends received in respective said first ends of said stays; a flexible cover over said s
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