SAN JOSE (KCBS) – Apple, Google and other leading Silicon Valley technology companies have joined hundreds across the nation in signing a friend-of-the-court brief urging the Supreme Court to overturn the Defense of Marriage Act.

The brief argues the federal law defining marriage as between one man and one woman forces companies to create an onerous dual system for companies that, in order to attract the best talent, offer benefits to workers who have legally wed a same-sex partner.

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The brief claims “the burden of DOMA’s dual regime is keenly felt by organizations that conduct operations or do business in jurisdictions that authorize or recognize marriage between two people of the same sex.”

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The list of tech titans among the 278 companies that signed the brief also includes Adobe, Amazon, eBay, Oracle, and Twitter.

Those same companies are also expected to sign a brief arguing for the Supreme Court to overturn Proposition 8, California’s ban on same-sex marriage.

The Supreme Court is expected to hear oral arguments in both cases in March.

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