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发明名称
Verfahren zur Erzeugung lauter und rein sinusfoermiger Toene aus der Interferenz elektrischer Grundschwingungen, insbesondere zur Pruefung der menschlichen Hoerschaerfe
摘要
申请公布号
DE557433(C)
申请公布日期
1932.08.23
申请号
DE1926SC80128D
申请日期
1926.09.19
申请人
DIPL.-ING. FRITZ KRAFFT;THOMAS DATZMANN
发明人
SCHWARZ DR. WOLFGANG
分类号
A61B5/12
主分类号
A61B5/12
代理机构
代理人
主权项
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