NL140120B - SPEAKING TELEPHONE. - Google Patents

SPEAKING TELEPHONE.

Info

Publication number
NL140120B
NL140120B NL276184A NL276184A NL140120B NL 140120 B NL140120 B NL 140120B NL 276184 A NL276184 A NL 276184A NL 276184 A NL276184 A NL 276184A NL 140120 B NL140120 B NL 140120B
Authority
NL
Netherlands
Prior art keywords
speaking telephone
speaking
telephone
Prior art date
Application number
NL276184A
Other languages
Dutch (nl)
Inventor
Pasquale Ing Postorino
Original Assignee
Sits Soc It Telecom Siemens
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 Sits Soc It Telecom Siemens filed Critical Sits Soc It Telecom Siemens
Publication of NL140120B publication Critical patent/NL140120B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/62—Constructional arrangements
    • 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
    • H04M1/20—Arrangements for preventing acoustic feed-back

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
NL276184A 1961-03-28 1962-03-21 SPEAKING TELEPHONE. NL140120B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT554561 1961-03-28

Publications (1)

Publication Number Publication Date
NL140120B true NL140120B (en) 1973-10-15

Family

ID=11120277

Family Applications (2)

Application Number Title Priority Date Filing Date
NL276184D NL276184A (en) 1961-03-28
NL276184A NL140120B (en) 1961-03-28 1962-03-21 SPEAKING TELEPHONE.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
NL276184D NL276184A (en) 1961-03-28

Country Status (3)

Country Link
CH (1) CH380787A (en)
DE (1) DE1204271B (en)
NL (2) NL140120B (en)

Families Citing this family (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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE828714C (en) * 1948-10-02 1952-01-21 Siemens & Halske A G Telephone station

Also Published As

Publication number Publication date
CH380787A (en) 1964-08-14
DE1204271B (en) 1965-11-04
NL276184A (en)

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