Improvements relating to the Production of Gramophone Records
HENRY JAMES HUTTON, WALTER LESLIE RAND, LESLIE ERIC ZOUCH, JOHN ERNEST SIMMONS
Year of Publication 20.05.1970
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Year of Publication 20.05.1970
Patent
Improvements relating to the production of Gramophone Records
HENRY JAMES HUTTON, ALAN THOMPSON, WALTER LESLIE RAND, WILLIAM HERBERT TOULL
Year of Publication 25.03.1970
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Year of Publication 25.03.1970
Patent