2 trademarks were found for owners matching the name Otmar Birkner.
#Classstatus
1 S:79112472
M:AUTOGYRO

O:AutoGyro AG, Otmar Birkner
7, 12, 14, 39 Dead
2 S:79068185
M:CALIDUS
O:AutoGyro AG, Otmar Birkner
7, 12, 39 Registered
Trademark Alertz updated from USPTO on 2030-01-24