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发明名称
Signal
摘要
申请公布号
US1797394(A)
申请公布日期
1931.03.24
申请号
US19250044636
申请日期
1925.07.18
申请人
SPERRY GYROSCOPE COMPANY, INC.
发明人
BASSETT PRESTON R.
分类号
B64F1/20
主分类号
B64F1/20
代理机构
代理人
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