A US jury on Friday awarded OptisWireless Technology LLC and several related companies $300million in damages after a second patent trial against iPhonemaker Apple Inc.

A jury had previously found that Apple had infringed five Optis wireless standard essential patents and awarded $506 million in damages, but US District Judge Rodney Gilstrap in Marshall, Texas, vacated that award in April and ordered a new trial to determine the amount of damages.

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In a statement, Apple said: "Optis makes no products and its sole business is to sue companies using patents they accumulate.We will continue to defend against their attempts to extractunreasonable payments for patents they acquire."