Inventor
ADOLF RICK
US4 patents
Patents
4 patentsUS7083420B2Aug 1, 2006
Interactive handheld apparatus with stylus
LEAPFROG ENTPR INC17 citations90
US7553160B2Jun 30, 2009
Interactive hand held apparatus with stylus
LEAPFROG ENTPR INC11 citations82
US7529519B2May 5, 2009
Interactive handheld educational apparatus with stylus
LEAPFROG ENTPR INC7 citations70
US8025505B2Sep 27, 2011
Interactive hand held apparatus with stylus
LEAPFROG ENTPR INC3 citations59