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经营范围
发明名称
Procédé d'enregistrement ou de transmission d'oscillations mécaniques ou électriques par l'intermédiaire de la lumière et dispositif pour sa mise en oeuvre.
摘要
申请公布号
CH145783(A)
申请公布日期
1931.03.15
申请号
CHD145783
申请日期
1929.12.02
申请人
THE GRAMOPHONE COMPANY, LIMITED
发明人
LIMITED THE GRAMOPHONE COMPANY,
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