BE770227A - Perfectionnement dans les postes telephoniques avec emission par microphone avec amplificateur et reception par - Google Patents

Perfectionnement dans les postes telephoniques avec emission par microphone avec amplificateur et reception par

Info

Publication number
BE770227A
BE770227A BE770227A BE770227A BE770227A BE 770227 A BE770227 A BE 770227A BE 770227 A BE770227 A BE 770227A BE 770227 A BE770227 A BE 770227A BE 770227 A BE770227 A BE 770227A
Authority
BE
Belgium
Prior art keywords
receipt
emission
improvement
microphone amplifier
telephone stations
Prior art date
Application number
BE770227A
Other languages
English (en)
French (fr)
Original Assignee
Barok Albert
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
Priority to FR7029610A priority Critical patent/FR2102614A5/fr
Application filed by Barok Albert filed Critical Barok Albert
Publication of BE770227A publication Critical patent/BE770227A/xx

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Interconnection arrangements not involving centralised switching
    • H04M9/08Two-way loud-speaking telephone systems with means for suppressing echoes or otherwise conditioning for one or other direction of traffic
BE770227A 1970-08-06 1971-07-20 Perfectionnement dans les postes telephoniques avec emission par microphone avec amplificateur et reception par BE770227A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7029610A FR2102614A5 (xx) 1970-08-06 1970-08-06

Publications (1)

Publication Number Publication Date
BE770227A true BE770227A (fr) 1971-12-01

Family

ID=9060098

Family Applications (1)

Application Number Title Priority Date Filing Date
BE770227A BE770227A (fr) 1970-08-06 1971-07-20 Perfectionnement dans les postes telephoniques avec emission par microphone avec amplificateur et reception par

Country Status (8)

Country Link
US (1) US3787621A (xx)
BE (1) BE770227A (xx)
CA (1) CA976287A (xx)
CH (1) CH546524A (xx)
DE (1) DE2136313A1 (xx)
ES (1) ES393619A1 (xx)
FR (1) FR2102614A5 (xx)
GB (1) GB1360227A (xx)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2314631B1 (xx) * 1975-06-11 1977-12-09 Jeumont Schneider
FR2376576B1 (xx) * 1976-12-31 1981-11-27 Girard J Philippe
JPS5751789B2 (xx) * 1977-12-27 1982-11-04
DE3213968C2 (xx) * 1982-04-16 1984-06-14 Deutsche Fernsprecher Gesellschaft Mbh Marburg, 3550 Marburg, De
US4715062A (en) * 1985-03-22 1987-12-22 Tie/Communications, Inc. Speakerphone control circuit having low gain states and method for controlling gain of speakerphone
FI78373C (fi) * 1988-01-18 1989-07-10 Sostel Oy Telefontrafik- eller dataoeverfoeringssystem.
US5020101A (en) * 1989-04-10 1991-05-28 Gregory R. Brotz Musicians telephone interface

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL245570A (xx) * 1958-12-29
US3594507A (en) * 1969-10-22 1971-07-20 William T Clark Feedback eliminating device for audio amplifying systems
US3665106A (en) * 1970-04-28 1972-05-23 Research Corp Intercommunication system

Also Published As

Publication number Publication date
DE2136313A1 (xx) 1972-02-10
ES393619A1 (es) 1974-07-01
CA976287A (en) 1975-10-14
GB1360227A (en) 1974-07-17
US3787621A (en) 1974-01-22
CA976287A1 (xx)
CH546524A (fr) 1974-02-28
BE770227A1 (xx)
FR2102614A5 (xx) 1972-04-07

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