FR1108780A - Telephone device - Google Patents

Telephone device

Info

Publication number
FR1108780A
FR1108780A FR1108780DA FR1108780A FR 1108780 A FR1108780 A FR 1108780A FR 1108780D A FR1108780D A FR 1108780DA FR 1108780 A FR1108780 A FR 1108780A
Authority
FR
France
Prior art keywords
telephone device
telephone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co PLC filed Critical General Electric Co PLC
Application granted granted Critical
Publication of FR1108780A publication Critical patent/FR1108780A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/76—Compensating for differences in line impedance

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
FR1108780D 1953-07-01 1954-06-30 Telephone device Expired FR1108780A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1824853A GB743024A (en) 1953-07-01 1953-07-01 Improvements in or relating to telephone apparatus

Publications (1)

Publication Number Publication Date
FR1108780A true FR1108780A (en) 1956-01-17

Family

ID=10109204

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1108780D Expired FR1108780A (en) 1953-07-01 1954-06-30 Telephone device

Country Status (2)

Country Link
FR (1) FR1108780A (en)
GB (1) GB743024A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH329587A (en) * 1955-04-05 1958-04-30 Kunckel Heinz Portable telephone with local battery
BE558459A (en) * 1956-06-19
BE565189A (en) * 1957-01-15

Also Published As

Publication number Publication date
GB743024A (en) 1956-01-04

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