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发明名称
Rotationssymmetrischer piezoelektrischer Schwingkristall
摘要
申请公布号
DE734783(C)
申请公布日期
1943.04.24
申请号
DE1938T050925D
申请日期
1938.09.01
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
BECHMANN DR. RUDOLF
分类号
H03H9/17
主分类号
H03H9/17
代理机构
代理人
主权项
地址
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