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发明名称
TRIGONOMETRIC BRIDGE
摘要
申请公布号
US3527931(A)
申请公布日期
1970.09.08
申请号
USD3527931
申请日期
1968.01.11
申请人
NORTH ATLANTIC IND. INC.
发明人
JOHN B. HEAVISIDE
分类号
G06G7/22;H03K17/74;(IPC1-7):G06G7/22;G06G7/32
主分类号
G06G7/22
代理机构
代理人
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地址
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