Patent classifications
G
PHYSICS
Load children
G09
EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
Load children
G09F
DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
Load children
G09F21/06
by aeroplanes, airships, balloons, or kites
Load children Filter patents View analytics View as hierarchy
G09F21/12
the advertising matter being towed by the aircraft
Load children Filter patents View analytics View as hierarchy