FR672302A - Improvements in telephone inter-communication devices - Google Patents

Improvements in telephone inter-communication devices

Info

Publication number
FR672302A
FR672302A FR672302DA FR672302A FR 672302 A FR672302 A FR 672302A FR 672302D A FR672302D A FR 672302DA FR 672302 A FR672302 A FR 672302A
Authority
FR
France
Prior art keywords
communication devices
telephone
inter
telephone inter
communication
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.)
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 FR672302A publication Critical patent/FR672302A/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
    • H04M1/26—Devices for calling a subscriber
    • H04M1/52—Arrangements wherein a dial or the like is mechanically coupled to a line selector

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
FR672302D 1928-04-05 1929-03-29 Improvements in telephone inter-communication devices Expired FR672302A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE309152X 1928-04-05

Publications (1)

Publication Number Publication Date
FR672302A true FR672302A (en) 1929-12-26

Family

ID=20307598

Family Applications (1)

Application Number Title Priority Date Filing Date
FR672302D Expired FR672302A (en) 1928-04-05 1929-03-29 Improvements in telephone inter-communication devices

Country Status (3)

Country Link
FR (1) FR672302A (en)
GB (1) GB309152A (en)
NL (1) NL25996C (en)

Also Published As

Publication number Publication date
GB309152A (en) 1930-01-09
NL25996C (en)

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