FR576443A - Improvements to telephone devices - Google Patents

Improvements to telephone devices

Info

Publication number
FR576443A
FR576443A FR576443DA FR576443A FR 576443 A FR576443 A FR 576443A FR 576443D A FR576443D A FR 576443DA FR 576443 A FR576443 A FR 576443A
Authority
FR
France
Prior art keywords
telephone devices
telephone
devices
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR576443A publication Critical patent/FR576443A/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
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Circuit For Audible Band Transducer (AREA)
FR576443D 1923-02-07 1924-01-29 Improvements to telephone devices Expired FR576443A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US617532A US1601060A (en) 1923-02-07 1923-02-07 Telephone hand set

Publications (1)

Publication Number Publication Date
FR576443A true FR576443A (en) 1924-08-20

Family

ID=24474015

Family Applications (1)

Application Number Title Priority Date Filing Date
FR576443D Expired FR576443A (en) 1923-02-07 1924-01-29 Improvements to telephone devices

Country Status (4)

Country Link
US (1) US1601060A (en)
FR (1) FR576443A (en)
GB (1) GB211141A (en)
NL (1) NL16264C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530556A (en) * 1947-04-26 1950-11-21 Bell Telephone Labor Inc Support and cord assembly for hand telephones

Also Published As

Publication number Publication date
US1601060A (en) 1926-09-28
GB211141A (en) 1924-09-25
NL16264C (en)

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