NL152599B
(en )
1977-03-15
METHOD FOR PREPARING A DETERGENT.
NL144099B
(en )
1974-11-15
INTERRUPTION SYSTEM FOR AN AUTOMATIC TELEPHONE EXCHANGE
NL160135C
(en )
1979-04-17
CIRCUIT FOR A TELECOMMUNICATIONS SYSTEM, IN PARTICULAR A TELEPHONE SYSTEM, DETECTING THE LINE CONDITION OF A LINE.
NL154904B
(en )
1977-10-17
DEVICE FOR FINDING A FREE WAY IN A SWITCHING NETWORK.
NL154438B
(en )
1977-09-15
PROCEDURE FOR FORMING A LADDER CONNECTION USING A BATTERY.
NL149057B
(en )
1976-03-15
IMPROVEMENT OF A CIRCUIT FOR A TELECOMMUNICATIONS CENTER, ESPECIALLY TELEPHONE EXCHANGE.
NL7413803A
(en )
1975-05-02
ACTIVE HYBRIDIC CIRCUIT FOR CONNECTING A FOUR WIRE COMMUNICATION CHANNEL WITH A TWO WIRE COMMUNICATION CHANNEL.
NL167825C
(en )
1982-01-18
DISTRIBUTION SYSTEM FOR TELECOMMUNICATIONS, IN PARTICULAR TELEPHONE EQUIPMENT.
NL147306B
(en )
1975-09-15
CIRCUIT FOR EXAMINING THE INSTITUTION FOR MARKED DEVICES, ESPECIALLY WITH A TELEPHONE CONNECTION SYSTEM.
NL151608B
(en )
1976-11-15
CIRCUIT FOR A CONNECTING SYSTEM.
NL161029C
(en )
1983-12-16
LOCK-FREE SWITCHING DEVICE FOR A TIME MULTIPLEX COMMUNICATION SYSTEM.
NL156162B
(en )
1978-03-15
METHOD FOR PREPARING A COPOLYMER.
NL159851B
(en )
1979-03-15
PROCEDURE FOR INSTALLING THE WIRING OF A TELECOMMUNICATIONS CENTRAL, ESPECIALLY TELEPHONE EXCHANGE.
NL143059B
(en )
1974-08-15
DEVICE FOR MANUFACTURING THE CONDUCTOR BUNDLES FOR A TELECOMMUNICATION CABLE CONSTRUCTED FROM BUNDLES.
NL156565B
(en )
1978-04-17
SWITCHING DEVICE FOR A TELECOMMUNICATIONS SWITCHING SYSTEM, IN PARTICULAR TELEPHONE SWITCHING SYSTEM, WITH A COUPLING FIELD.
NL153408B
(en )
1977-05-16
CONNECTION FOR A TELECOMMUNICATIONS SYSTEM, IN PARTICULAR TELEPHONE SYSTEM.
NL149661B
(en )
1976-05-17
SPEAKING TELEPHONE SET.
NL142558B
(en )
1974-06-17
CIRCUIT FOR A TELECOMMUNICATIONS CONNECTION SYSTEM.
NL155699B
(en )
1978-01-16
CIRCUIT FOR A TELECOMMUNICATIONS SYSTEM, IN PARTICULAR HOME PHONE SYSTEM
NL156884B
(en )
1978-05-16
CIRCUIT FOR A TELECOMMUNICATIONS SYSTEM, IN PARTICULAR TELEPHONE SYSTEM, WITH DUAL CONNECTIONS.
NL154087B
(en )
1977-07-15
CIRCUIT FOR A COMMUNICATION CONNECTION SYSTEM, ESPECIALLY TELEPHONE CONNECTION SYSTEM.
NL159842B
(en )
1979-03-15
DECENTRALIZED LOCAL TELEPHONE SYSTEM.
NL159557B
(en )
1979-02-15
TELECOMMUNICATIONS CONNECTION SCHEME, IN PARTICULAR TELEPHONE CONNECTION SYSTEM.
NL158351B
(en )
1978-10-16
CONNECTION FOR A CENTRALLY CONTROLLED TELECOMMUNICATIONS, IN PARTICULAR TELEPHONE CONNECTION SYSTEM.
NL151239B
(en )
1976-10-15
CIRCUIT FOR A TELECOMMUNICATIONS SYSTEM.