Trademark Trademarks Filed in December 21, 1907
DUPLEX
Filed: December 21, 1907
SLIDE-RULES
Owned by: KEUFFEL & ESSER COMPANY
Serial Number: 71031871
IMMADIUM
Filed: December 21, 1907
METALLIC ALLOYS
Owned by: MANGANESE BRONZE & BRASS COMPANY LIMITED, THE
Serial Number: 71031874
CROTORITE
Filed: December 21, 1907
METALLIC ALLOYS
Owned by: MANGANESE BRONZE & BRASS COMPANY LIMITED, THE
Serial Number: 71031875
