3 trademarks were found for owners matching the name Robert C. J. Porter.
#Classstatus
1 S:90539605
M:UMCO

O:Robert C. J. Porter
8 Registered
2 S:90463303
M:UNION MFG. CO. TRADE MARK PENNSYLVANIA, USA

O:Robert C. J. Porter
8 Registered
3 S:88878172
M:X PLANE
O:Robert C. J. Porter
8 Registered
Trademark Alertz updated from USPTO on 2030-01-24