Improvements in or relating to combinations of an electric discharge device and material adapted to be excited to luminescence by the discharge in the device
摘要
申请公布号
GB495415(A)
申请公布日期
1938.11.14
申请号
GB19370013669
申请日期
1937.05.14
申请人
THE GENERAL ELECTRIC COMPANY LIMITED;JOHN TURTON RANDALL
