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经营范围
发明名称
Underwater microphone
摘要
申请公布号
US2582994(A)
申请公布日期
1952.01.22
申请号
US19430489669
申请日期
1943.06.04
申请人
GEOPHYSICAL RESEARCH CORPORATION
发明人
KENDALL JAMES M.
分类号
B06B1/04
主分类号
B06B1/04
代理机构
代理人
主权项
地址
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PIEZOELECTRIC COMPONENT
FACSIMILE EQUIPMENT PROVIDED WITH RE-TRANSMISSION FUNCTION
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DRY ETCHING APPARATUS
INSULATED TYPE INTERFACE CIRCUIT IN HALF DUPLEX SERIAL TRANSMISSION LINE
METHOD FOR DETERMINING NUMBER OF CALLS THAT CAN BE ACCEPTED AT CONGESTION TIME
SEMICONDUCTOR WAVELENGTH CONVERSION ELEMENT
