Skis or snowboards

AHUMAN NECESSITIES A63Sports, games A63CSKATES SKIS ROLLER SKATES DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE

A63C5/00Skis or snowboards

A63C5/003Structure, covering or decoration of the upper ski surface A63C5/006Appearance of the ski-tip, the rear end or the upper ski-edge A63C5/02collapsible divided A63C5/03Mono skis Snowboards A63C5/031Snow-ski boards with two or more runners or skis connected together by a rider-supporting platform A63C5/033Devices for enabling the use of a normal ski as mono-ski A63C5/035with ground engaging rolls or belts A63C5/04Structure of the surface thereof A63C5/0405Shape thereof when projected on a plane A63C5/0411asymmetric A63C5/0417with fins or longitudinal protrusions on the running sole A63C5/0422Longitudinal guiding grooves A63C5/0428Other in-relief running soles A63C5/0434of the side walls A63C5/044of the running sole A63C5/048of the edges A63C5/0485Complementary or supplementary ski edges A63C5/052of the tips or rear ends A63C5/056Materials for the running sole A63C5/06with special devices thereon A63C5/061Ski-boot sole-scrapers A63C5/062Protection or reinforcement devices for the ski-tip or the ski rear end A63C5/065Anti-crossing devices A63C5/07comprising means for adjusting stiffness A63C5/075Vibration dampers A63C5/08motor-driven A63C5/085with rolling or like devices A63C5/11combined with sails or the like; Accessories specially adapted for sail-skiing A63C5/12Making thereof Selection of particular materials A63C5/122Selection of particular materials for damping purposes A63C5/124Selection of particular materials for the upper ski surface A63C5/126Structure of the core A63C5/128A part for the binding being integrated within the board structure A63C5/16Devices enabling skis to be used whilst held in a particular configuration with respect to each other