Inventor

DONALDSON ROBERT M

US3 patents

Patents

3 patents

US4346937AAug 31, 1982

Dredging apparatus including suction nozzles

DEEPSEA VENTURES INC9 citations69

US4178704ADec 18, 1979

Suction nozzle dredge head

DEEPSEA VENTURES INC3 citations59

US4171581AOct 23, 1979

Water flow-deflecting shield for dredge suction nozzle

DEEPSEA VENTURES INC3 citations57