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See Gramophone Co
1908 In February, the Gramophone Co introduced new labels featuring the famous trademark known as His Master's Voice, generally referred to as HMV, to distinguish them from earlier labels which featured an outline of the Recording Angel trademark. The latter had been designed by Theodore Birnbaum, an executive of the Gramophone Company pressing plant in Hanover, Germany. The Gramophone Co was never known as the HMV or His Master's Voice company.
1929 The Gramophone Co started manufacture and sale of His Master's Voice domestic radio sets.
1931 The Gramophone Co was merged into the new EMI
1957 Thorn Electrical Industries took over production of HMV equipment from EMI
Radio
See HMV: Radio