FR689473A - Perfectionnements aux micro-téléphones - Google Patents

Perfectionnements aux micro-téléphones

Info

Publication number
FR689473A
FR689473A FR689473DA FR689473A FR 689473 A FR689473 A FR 689473A FR 689473D A FR689473D A FR 689473DA FR 689473 A FR689473 A FR 689473A
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)
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 FR689473A publication Critical patent/FR689473A/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)
FR689473D 1929-02-09 1930-02-05 Perfectionnements aux micro-téléphones Expired FR689473A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE333861X 1929-02-09

Publications (1)

Publication Number Publication Date
FR689473A true FR689473A (fr) 1930-09-08

Family

ID=20308178

Family Applications (1)

Application Number Title Priority Date Filing Date
FR689473D Expired FR689473A (fr) 1929-02-09 1930-02-05 Perfectionnements aux micro-téléphones

Country Status (3)

Country Link
BE (1) BE367612A (fr)
FR (1) FR689473A (fr)
GB (1) GB333861A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2475303A (en) * 1946-08-26 1949-07-05 Colorphone Inc Decorative cover for telephone handpieces
US4087659A (en) * 1977-01-21 1978-05-02 Boenecke Charles A Tamperproof handset for railroad applications

Also Published As

Publication number Publication date
GB333861A (en) 1930-08-21
BE367612A (fr)

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