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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0827331 (1992-01-29) |
발명자 / 주소 |
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출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 4 인용 특허 : 0 |
A non-marring drawing instrument includes a rolling member for supporting the body of the instrument on a drawing surface in spaced apart relation thereto. The rolling member is mounted on the body for movement between respective rolling and locked positions of the member projecting from the body. A
A drawing instrument comprising: an instrument body, a rolling member adapted for supporting said body on a drawing surface, means mounting said rolling member on said body for relative movement to and from the body between respective rolling and locked positions of the member projecting from the bo
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