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
5/00
Arrangements on vessels of propulsion elements directly acting on water
Load children Filter patents View analytics View as hierarchy
B63H5/08
of more than one propeller
Load children Filter patents View analytics View as hierarchy
B63H5/10
of coaxial type, e.g. of counter-rotative type
Load children Filter patents View analytics View as hierarchy