Improvements in or relating to constant frequency periodic devices for use in connection with electrical high frequency oscillators, radio transmitters and the like
摘要
申请公布号
GB391880(A)
申请公布日期
1933.05.11
申请号
GB19310031256
申请日期
1931.11.11
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY, LIMITED;SIDNEY BERTRAM SMITH;CYRIL JOHN FRANCIS TWEED
