Collapsible paddle boat

Collapsible pontoon pedal boat

Collapsible water bike

Device for converting a cycle into a treadle-operated water cycl

Device for propelling a diver through a body of water using...

Drive mechanism assembly for aquatic vehicle

Electric motor assisted propulsion system for human-powered...

Equipment for towless skiing on water surface

Exercising device for water use

Feet-propelled water vehicle

Floating apparatus with manual driver

Flotatation device propelled by human-powered ski machine

Foot-operated boat paddle propulsion system

Hand propulsion device for a paddle boat

Helical drive human powered boat

Human powered marine vehicle and method for the operation thereo

Human powered watercraft

Human powered watercraft

Human propelled buoyant annular float with removable pontoon sta

Human-powered or human-assisted energy generation and...