최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0114068 (1980-01-21) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 26 인용 특허 : 0 |
Sets of educational blocks are described wherein special volumetric relationships are combined with visually distinctive geometric shapes. In one set of blocks a common cube is cut into distinctive segments along a single slice to form particular polygons. In another set of blocks a common cube is c
A set of educational blocks formed from a common cube and comprising a regular rhombic dodecahedron being the largest which can fit inside said common cube and twelve related outer segments which fit in complementary fashion with the rhombic dodecahedron to fill out a common cube, said related out s
※ AI-Helper는 부적절한 답변을 할 수 있습니다.