Keywords: KristiSnowplane.jpg Patent Office image of a Kristi Snowplane design featuring adjustable ski action technology BadJPEG PD-USGov original upload log page en wikipedia KristiSnowplane jpg 2007-02-24 05 24 Melensdad 600×385×8 68685 bytes <nowiki></nowiki> 2007-02-24 04 24 Melensdad 600×385×8 73434 bytes <nowiki>US Patent Office Image</nowiki> 2007-02-24 04 19 Melensdad 600×385×8 53126 bytes <nowiki>Patent Office image of a Kristi Snowplane design featuring adjustable ski action </nowiki> Aerosani |