U.S. federal trademark · Serial No. 72284804 · Reg. No. 0856519
COMBINATION SEALS, PRIMARILY FOR DYNAMIC SEALING OF CYLINDER BORES AND PISTON RODS, WITH AN ELASTOMERIC O-RING SQUEEZED BEHIND A SECOND ELASTOMERIC RING OF NON-CIRCULAR CROSS SECTION AND WITH GENERALLY PARALLEL SEALING FACES ON ITS OPPOSITE SIDES
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