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FR445939A - Telephone installation for residential houses and other similar applications - Google Patents

Telephone installation for residential houses and other similar applications

Info

Publication number
FR445939A
FR445939A FR445939A FR445939DA FR445939A FR 445939 A FR445939 A FR 445939A FR 445939 A FR445939 A FR 445939A FR 445939D A FR445939D A FR 445939DA FR 445939 A FR445939 A FR 445939A
Authority
FR
France
Prior art keywords
similar applications
residential houses
telephone installation
telephone
installation
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
FR445939A
Other languages
French (fr)
Inventor
Eugen Ramdohr
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR445939A publication Critical patent/FR445939A/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
    • H04M1/0291—Door telephones

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
FR445939A 1912-07-11 1912-07-10 Telephone installation for residential houses and other similar applications Expired FR445939A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191216241T 1912-07-11

Publications (1)

Publication Number Publication Date
FR445939A true FR445939A (en) 1912-11-22

Family

ID=32368703

Family Applications (1)

Application Number Title Priority Date Filing Date
FR445939A Expired FR445939A (en) 1912-07-11 1912-07-10 Telephone installation for residential houses and other similar applications

Country Status (2)

Country Link
FR (1) FR445939A (en)
GB (1) GB191216241A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552154A1 (en) * 1983-09-21 1985-03-22 Nivet Christian Device for communicating from the inside of an apartment to the outside without having to open its access

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552154A1 (en) * 1983-09-21 1985-03-22 Nivet Christian Device for communicating from the inside of an apartment to the outside without having to open its access

Also Published As

Publication number Publication date
GB191216241A (en) 1912-12-19

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