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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0167820 (1988-03-14) |
우선권정보 | IL-0082650 (1987-05-25) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 4 인용 특허 : 5 |
A puzzle-type amusement device comprises a stack of rotatable discs formed with two openings adapted to be aligned with each other; and a ball receivable through one of the openings in the top disc so as to pass through the openings aligned therewith in the intermediate discs to rest against the bot
A puzzle-type amusement device comprising: a stack of discs including a bottom disc at one end, a top disc at the opposite end, and a plurality of intermediate discs, each rotatably mounted with respect to the others; each of said intermediate and top discs being formed with at least two openings ad
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