|
CA74892A
|
|
Telephone toll line
|
|
CA22492A
|
|
Multiple circuit changer
|
|
CA48375A
|
|
Telephone circuits
|
|
CA23574A
|
|
Automatic electrical circuit switch
|
|
CA18308A
|
|
Magneto-electric call signal apparatus
|
|
CA48376A
|
|
Telephone exchange call boxes
|
|
CA25731A
|
|
Magneto-electric signalling apparatus
|
|
CA29836A
|
|
Telephone transmitter
|
|
CA22352A
|
|
Telephone circuits and apparatus
|
|
CA36040A
|
|
Electrical cable
|
|
CA29234A
|
|
Adjustable supporting of telephone transmitters
|
|
CA19335A
|
|
Switch board
|
|
CA31342A
|
|
System of telephonic communication
|
|
CA26014A
|
|
Telephone transmitter
|
|
CA28932A
|
|
Telephone system
|
|
CA23300A
|
|
Electric battery telephone
|
