prises, Inc.Writing stylus for electrographic position location apparatusUS71203856 f???vr. 200310 oct. 2006Leapfrog Enterprises, Inc.Write on interactive apparatus and methodUS712038611 mars 200310 oct. 2006Leapfrog Enterprises, Inc.Print media receiving unit including platform and print mediaUS713952311 mars 200321 nov. 2006Leapfrog Enterprises, Inc.Print media receiving unit including platform