2 trademarks were found for owners matching the name Yasuhiko Oyama.
#Classstatus
1 S:74088088
M:WORLD OYAMA KARATE ORGANIZATION

O:Oyama, Shigeru, Yasuhiko Oyama
25, 26 Dead
2 S:73759263
M:WORLD OYAMA KARATE ORGANIZATION

O:OYAMA, SHIGERU, Yasuhiko Oyama
41 Registered
Trademark Alertz updated from USPTO on 2030-01-24