Patent search ap:("FED TELECOMM LAB INC") AND inv:"DESCHAMPS GEORGES A" Page 1

1.

发明授权
Two-way communication system 失效
Title translation: 双向通信系统

公开(公告)号：US2666845A

公开(公告)日：1954-01-19

申请号：US25858451

申请日：1951-11-28

Applicant: FED TELECOMM LAB INC

Inventor： COLTON ROGER B , DESCHAMPS GEORGES A

IPC: H04B1/68 , H04B7/155 , H04B7/17 , H04J1/18 , H04J3/00 , H04J3/10

CPC classification number: H04B7/15542 , H04B1/68 , H04J1/18 , H04J3/00 , H04J3/10

Patent Agency Ranking