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经营范围
发明名称
HOORAPPARAAT.
摘要
申请公布号
NL168103(B)
申请公布日期
1981.09.16
申请号
NL19730010249
申请日期
1973.07.23
申请人
INDUSTRIAL RESEARCH PRODUCTS INC. TE ELK GROVE VILLAGE, ILLINOIS, VER. ST. V. AM.
发明人
分类号
H04R25/02;G02C11/06;H04R1/38;H04R25/00;(IPC1-7):H04R25/00
主分类号
H04R25/02
代理机构
代理人
主权项
地址
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