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经营范围
发明名称
Mechanical spring having negative spring stiffness useful in an electroacoustic transducer
摘要
申请公布号
US4722517(A)
申请公布日期
1988.02.02
申请号
US19860844048
申请日期
1986.03.26
申请人
DIJKSTRA, KEES;VIDEC, BERNARD P.;HUIZINGA, JAN;U.S. PHILIPS CORPORATION
发明人
DIJKSTRA, KEES;VIDEC, BERNARD P.;HUIZINGA, JAN
分类号
H04R1/28;H04R1/42;H04R3/00;H04R7/16;H04R7/26;H04R9/06;(IPC1-7):F16F3/00
主分类号
H04R1/28
代理机构
代理人
主权项
地址
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