Patent search ap:("FED TELECOMM LAB INC") AND inv:"DI TORO MICHAEL J" Page 1

1.

发明授权
Noise suppression circuit 失效

公开(公告)号：US2575333A

公开(公告)日：1951-11-20

申请号：US2448748

申请日：1948-05-01

Applicant: FED TELECOMM LAB INC

Inventor： DI TORO MICHAEL J

IPC: H03G5/20

CPC classification number: H03G5/20

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