NL46308C - - Google Patents

Info

Publication number
NL46308C
NL46308C NL46308DA NL46308C NL 46308 C NL46308 C NL 46308C NL 46308D A NL46308D A NL 46308DA NL 46308 C NL46308 C NL 46308C
Authority
NL
Netherlands
Application number
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.)
Publication of NL46308C publication Critical patent/NL46308C/xx

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/58Anti-side-tone circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/02Details
    • H04B3/20Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Arrangements for interconnection not involving centralised switching
    • H04M9/08Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/10Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
NL46308D 1935-09-19 NL46308C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN38630D DE665323C (en) 1935-09-19 1935-09-19 Hybrid circuit provided with feedback lock

Publications (1)

Publication Number Publication Date
NL46308C true NL46308C (en)

Family

ID=6540078

Family Applications (1)

Application Number Title Priority Date Filing Date
NL46308D NL46308C (en) 1935-09-19

Country Status (5)

Country Link
US (1) US2129990A (en)
DE (1) DE665323C (en)
FR (1) FR810646A (en)
GB (1) GB463178A (en)
NL (1) NL46308C (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE483501A (en) * 1947-03-13
FR1005063A (en) * 1947-05-29 1952-04-07 Device to avoid the feedback effect in loudspeaker telephone systems
CH271525A (en) * 1948-04-21 1950-10-31 Kaelin Pierre Station for sound transmission installation.
US2623949A (en) * 1949-06-08 1952-12-30 Le Teleampliphone Soc Two-way loud-speaker telephone installation
US2694749A (en) * 1950-04-18 1954-11-16 Sepco 45 B D Sebastopol Communication system
US2629024A (en) * 1950-12-29 1953-02-17 Bell Telephone Labor Inc Unbalanced-to-ground two-to-fourwire connection
DE976957C (en) * 1954-10-19 1965-03-11 Manfred Seiffert Facility for electrical underwater telephony
US3041411A (en) * 1958-06-10 1962-06-26 Donald C Beatty Automatic, circuit-condition-change-responsive, on-off control for loudspeaking telephone and the like
US3065300A (en) * 1958-09-30 1962-11-20 Modern Telephones Great Britai Loudspeaking telephone systems
NL125146C (en) * 1958-12-29
US3189690A (en) * 1960-04-27 1965-06-15 Modern Telephones Great Britai Two-way telephone systems with talk-listen switching
US3075045A (en) * 1960-08-29 1963-01-22 Bell Telephone Labor Inc Speakerphone

Also Published As

Publication number Publication date
GB463178A (en) 1937-03-23
US2129990A (en) 1938-09-13
FR810646A (en) 1937-03-24
DE665323C (en) 1938-09-22

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