Machinery Trademarks Filed in April 2, 1952
DI-HARD
Filed: April 2, 1952
PUMP LINERS AND BARRELS, WATER TUBES FOR SWIVELS, AND PLUNGER PUMPS
Owned by: UNITED STATES STEEL COMPANY
Serial Number: 71627472
SILVERLINE
Filed: April 2, 1952
PUMP BARRELS
Owned by: UNITED STATES STEEL COMPANY
Serial Number: 71627473
