发明名称 Math playing cards
摘要 Decks of addition, subtraction, multiplication, division, and number recognition playing cards cover all the numbers generally employed in teaching children basic addition, subtraction, multiplication, division, and number recognition skills and are suitable for use in playing a variety of well know card games such as War, Concentration, Old Maid, Go Fish, Rummy, Gin Rummy, 21, and Spit.
申请公布号 US2004232618(A1) 申请公布日期 2004.11.25
申请号 US20030440764 申请日期 2003.05.19
申请人 FRIEMAN SHLOMO RUVANE 发明人 FRIEMAN SHLOMO RUVANE
分类号 A63F1/02;A63F1/04;A63F3/04;(IPC1-7):A63F1/00 主分类号 A63F1/02
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