FR25839E - Improvements to telephone receivers - Google Patents

Improvements to telephone receivers

Info

Publication number
FR25839E
FR25839E FR25839DA FR25839E FR 25839 E FR25839 E FR 25839E FR 25839D A FR25839D A FR 25839DA FR 25839 E FR25839 E FR 25839E
Authority
FR
France
Prior art keywords
telephone receivers
receivers
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.)
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 FR25839E publication Critical patent/FR25839E/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)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
FR25839D 1920-12-24 1921-12-20 Improvements to telephone receivers Expired FR25839E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US173495XA 1920-12-24 1920-12-24

Publications (1)

Publication Number Publication Date
FR25839E true FR25839E (en) 1923-05-28

Family

ID=21782078

Family Applications (1)

Application Number Title Priority Date Filing Date
FR25839D Expired FR25839E (en) 1920-12-24 1921-12-20 Improvements to telephone receivers

Country Status (2)

Country Link
FR (1) FR25839E (en)
GB (1) GB173495A (en)

Also Published As

Publication number Publication date
GB173495A (en) 1923-03-09

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