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Telephone dialing arrangement

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone dialing device and the operating method thereof

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone dialing system

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone dialing system

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone dialing system with error indicating function

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone dialler with a personalized page organization of telep

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone dialler with a personalized page organization of telep

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone dialler with easy access memory

Telephonic communications – Supervisory or control line signaling – Substation originated
Reexamination Certificate

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Telephone dialler with fast access telephone directory and "call

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone equipment for reduced key operations

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone for retrieving memory content through simple...

Telephonic communications – Supervisory or control line signaling – Substation originated
Reexamination Certificate

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Telephone having an internally lit display

Telephonic communications – Supervisory or control line signaling – Substation originated
Reexamination Certificate

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Telephone having hand-set to be used also as voice...

Telephonic communications – Supervisory or control line signaling – Substation originated
Reexamination Certificate

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Telephone instrument

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone instrument

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone key selection aid

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone keypad matrix

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone keypad matrix

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone line switch

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Telephone long distance redialing apparatus and process

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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