Skates; Accessories for skates; Skis; Ski vehicles; Devices preventing skis from slipping back; Ski-stoppers or ski-brakes; Ski bindings; Accessories for skis; Devices for stretching, clamping or pressing skis for transportation or storage; Apparatus for towing skis; Apparatus for hooking the heel part of the boot to the ski; Apparatus for repairing damaged skis; Special devices on boots for fastening skis thereto; Devices for removing snow from skis, ski-bindings or ski-boots; Snow-protectors on skis; Ski-sticks; Devices for use in mounting ski-bindings to skis, e.g. jigs; Snow shoes; Roller skates; Skate-boards; Design or layout of playing courts, rinks, bowling greens or areas for water-skiing; Covers therefor.