FR660753A - Perfectionnements aux micro-téléphones - Google Patents

Perfectionnements aux micro-téléphones

Info

Publication number
FR660753A
FR660753A FR660753DA FR660753A FR 660753 A FR660753 A FR 660753A FR 660753D A FR660753D A FR 660753DA FR 660753 A FR660753 A FR 660753A
Authority
FR
France
Prior art keywords
telephones
micro
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
English (en)
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of FR660753A publication Critical patent/FR660753A/fr
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)
  • Telephone Set Structure (AREA)
FR660753D 1927-09-20 1928-09-14 Perfectionnements aux micro-téléphones Expired FR660753A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE297390X 1927-09-20

Publications (1)

Publication Number Publication Date
FR660753A true FR660753A (fr) 1929-07-17

Family

ID=20307356

Family Applications (1)

Application Number Title Priority Date Filing Date
FR660753D Expired FR660753A (fr) 1927-09-20 1928-09-14 Perfectionnements aux micro-téléphones

Country Status (4)

Country Link
BE (1) BE354302A (en:Method)
FR (1) FR660753A (en:Method)
GB (1) GB297390A (en:Method)
NL (1) NL25060C (en:Method)

Also Published As

Publication number Publication date
NL25060C (en:Method)
GB297390A (en) 1929-11-28
BE354302A (en:Method)

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