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发明名称
Means and method for eliminating hum in rectified alternating currrent operated photo-electric cell amplifiers
摘要
申请公布号
US1977858(A)
申请公布日期
1934.10.23
申请号
US19310515943
申请日期
1931.02.16
申请人
OWENS FREEMAN H
发明人
OWENS FREEMAN H.
分类号
H04B1/16
主分类号
H04B1/16
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