CH408124A
(en )
1966-02-28
Telephone
FR1283074A
(en )
1962-01-27
Subscriber telephone installation
NL142556B
(en )
1974-06-17
TELEPHONE SWITCHING SYSTEM WITH PBX CENTRALS.
FI36046A
(en )
1966-07-11
Telecommunication management for telephones and special telephone exchanges with or without a subscription
CH408129A
(en )
1966-02-28
Conference call for telephone participants
CH395196A
(en )
1965-07-15
Telephone subscriber station with signaling device
FR1376697A
(en )
1964-10-31
telephone call transmitter
CH425904A
(en )
1966-12-15
Telephone subscriber device
CH374104A
(en )
1963-12-31
Telecommunication system with relay-free subscriber line circuits
FR1443219A
(en )
1966-06-24
Circuit for locating called subscribers and routing calls in a telephone network
FR1354789A
(en )
1964-03-13
Telephone network
FR1342878A
(en )
1963-11-15
Telephone subscriber station with teletype
AU271846B2
(en )
1964-04-09
Telephone subscribers metering equipment
FI41756C
(en )
1970-02-10
Call handling for telephone exchanges, specially designed for local calls with home and impulsive connections
GR22764B
(en )
1962-01-27
TELEPHONE CALL CERTIFICATION ZERO NUMBER 0.
CH403878A
(en )
1965-12-15
Circuit arrangement for determining the call number of subscribers in telecommunications, in particular telephone systems
FR1355864A
(en )
1964-03-20
Telephone intercommunication network
AU2275762A
(en )
1964-04-09
Telephone subscribers metering equipment
CA621711A
(en )
1961-06-06
Subscriber ringing in carrier telephone systems
CH408131A
(en )
1966-02-28
Signaling procedures via telecommunication lines, in particular telephone lines
FR1326515A
(en )
1963-05-10
Counter for telephone communications
FR1346612A
(en )
1963-12-20
Telecommunication network
GR29571B
(en )
1966-02-16
TELEPHONE SUBSCRIBERS INDEX.
CA633323A
(en )
1961-12-26
Subscriber telephone set
AU262547B2
(en )
1963-11-07
Identifying calling subscribers in automatic telephone exchanges