Dorsiflexion skate brake

Double hinged skate

Double klap flex base boot with heel linkage

Double klap flex base boot with heel linkage

Double line roller skate

Double lock rotatable snowboard boot binding

Double piano hinge vehicle suspension

Double-action inline skate with wheel surface shaped for...

Double-edged snowboard

Double-edged snowboard

Double-foot plate pedaling skate

Double-shoe ski with intermediate linking member

Dougle edge snow ski

Downhill ski

Downhill ski binding adapter

Downhill ski with elongated tip

Downhill ski with integrated binding/traction device

Downhill ski with integrated binding/traction device

Downhill ski with traction device

Downhill skis incorporating integral probe assembly for controll