Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: A watan Maris na 1970, Larry D. Nichols ya kirkiro 2 × 2 × 2 "Puzzle tare da Pieces Rotatable in Groups" kuma ya gabatar da takardar neman izinin Kanada don shi. Nichols's cube ya kasance tare da maganadiso. An ba Nichols lasisin Amurka 3,655,201 a ranar 11 ga Afrilu, 1972, shekaru biyu kafin Rubik ya ƙirƙira Cube.  Tambaya: Yaushe Nichols ya yi takardar neman izinin mallakar cube dinsa?
Maris na shekara ta 1970