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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0073973 (1987-07-15) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 11 인용 특허 : 0 |
A main plate having a bookstop on its lower end and having a cavity on its inside. The cavity slidably retains two slide plates which are extendable from its lateral sides and one top plate which is extendable from its top. The top plate itself also has two slide plates which are extendable from its
An extensible book prop comprising: (A) a main plate (1) having a book holding means and a central cavity (17); (B) two slide plates (2) being laterally extensible from the lateral sides of said main plate (1); (C) a top plate (3) being extensible from the top side of said main plate (1) from said c
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