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AT&T executive's testimony on spectrum savings gets go-ahead in US patent row

By Melissa Ritti ( August 6, 2025, 14:06 GMT | Insight) -- Headwater Research cannot block an AT&T executive without patent licensing or valuation experience from testifying as a fact witness at trial next week, a US magistrate judge ruled, finding that his take on spectral efficiency is relevant.Plans by patent owner Headwater Research to again pursue a spectrum savings-based reasonable royalty will be countered at trial next week with testimony from AT&T Senior Vice President of Corporate Development Robert LaGrone....

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