Amphibious airplane

Details Amphibious airplane Amphibious airplane

1976-09-03

1977-11-08

Douglas, Alan P.

Transportation

Rail vehicle

Element or attachment

D1214

Patent

active

D02462982

REFERENCES:
patent: D137891 (1944-05-01), Kelly
patent: 1928317 (1933-09-01), Rippen
patent: 3869102 (1975-03-01), Carroll

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