Callaway Sues Dunlop in Ball Patent Dispute

Callaway Golf Co., the largest U.S. golf club maker, sued Dunlop Slazenger Group Americas Inc. for allegedly infringing a golf ball patent.

In a federal lawsuit filed in Wilmington, Del., the Carlsbad-based company said Dunlop infringed a Callaway ball design featuring dimples with different diameters that provide “steeper entry angles” and “greater low-speed lift.” The design patent was issued in April.

Closely held Dunlop, based in Greenville, S.C., uses the patented design in its Maxfli A10 and other balls, the suit claimed.

Dunlop spokeswoman Brooke Smith said the company denies “the unfounded allegations” and will “vigorously” defend itself.

Shares of Callaway Golf rose 32 cents to $14.06 on the NYSE.