|
This page displays all 「FI」 in main group H04B13/00. |
HB:Handbook | ||||
|
CC:Concordance | |||||
|
|
Transmission systems characterised by the medium used for transmission, not provided for in groups H04B 3/00-H04B 11/00 | HB | CC | 5K054 | |
|
|
.Transmission systems in which the medium consists of the human body | HB | CC | 5K054 | |
|
|
.Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy | HB | CC | 5K054 | |