Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
Load children
B63
SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
Load children
B63H
MARINE PROPULSION OR STEERING
Load children
16/00
Marine propulsion by muscle power
Load children Filter patents View analytics View as hierarchy
B63H16/02
Movable thwarts; Footrests
Filter patents View analytics View as hierarchy