JPS49123706A - - Google Patents

Info

Publication number
JPS49123706A
JPS49123706A JP48037315A JP3731573A JPS49123706A JP S49123706 A JPS49123706 A JP S49123706A JP 48037315 A JP48037315 A JP 48037315A JP 3731573 A JP3731573 A JP 3731573A JP S49123706 A JPS49123706 A JP S49123706A
Authority
JP
Japan
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.)
Pending
Application number
JP48037315A
Other languages
Japanese (ja)
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 filed Critical
Priority to JP48037315A priority Critical patent/JPS49123706A/ja
Priority to US408589A priority patent/US3919490A/en
Priority to IT30944/73A priority patent/IT1003170B/it
Priority to DE2361721A priority patent/DE2361721A1/de
Publication of JPS49123706A publication Critical patent/JPS49123706A/ja
Pending 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
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
JP48037315A 1973-03-30 1973-03-30 Pending JPS49123706A (enrdf_load_html_response)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP48037315A JPS49123706A (enrdf_load_html_response) 1973-03-30 1973-03-30
US408589A US3919490A (en) 1973-03-30 1973-10-23 Crosstalk prevention in interphone systems and the like
IT30944/73A IT1003170B (it) 1973-03-30 1973-11-05 Circuito di prevenzione della diafo nia negli impianti interfonici e si mili
DE2361721A DE2361721A1 (de) 1973-03-30 1973-12-12 Schaltung zur verhinderung von nebensprechen in sprechanlagen und aehnlichen einrichtungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48037315A JPS49123706A (enrdf_load_html_response) 1973-03-30 1973-03-30

Publications (1)

Publication Number Publication Date
JPS49123706A true JPS49123706A (enrdf_load_html_response) 1974-11-27

Family

ID=12494237

Family Applications (1)

Application Number Title Priority Date Filing Date
JP48037315A Pending JPS49123706A (enrdf_load_html_response) 1973-03-30 1973-03-30

Country Status (4)

Country Link
US (1) US3919490A (enrdf_load_html_response)
JP (1) JPS49123706A (enrdf_load_html_response)
DE (1) DE2361721A1 (enrdf_load_html_response)
IT (1) IT1003170B (enrdf_load_html_response)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256232A (en) * 1978-12-05 1981-03-17 Celanese Corporation Powder composition and method of preparation

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3189690A (en) * 1960-04-27 1965-06-15 Modern Telephones Great Britai Two-way telephone systems with talk-listen switching
US3286031A (en) * 1963-03-04 1966-11-15 Alto Scient Co Inc Voice actuated device
US3567868A (en) * 1968-08-27 1971-03-02 Tokyo Shibaura Electric Co Interphone device having presence indicator means
US3610835A (en) * 1970-03-17 1971-10-05 Bell Telephone Labor Inc Loudspeaking telephone
JPS5148006B1 (enrdf_load_html_response) * 1970-09-03 1976-12-18
US3691311A (en) * 1970-12-10 1972-09-12 Pacific Plantronics Inc Telephone user set
US3743950A (en) * 1972-03-03 1973-07-03 Itt Threshold detector for a voice frequency receiver
US3725585A (en) * 1972-03-21 1973-04-03 Itt Loudspeaking telephone station circuit

Also Published As

Publication number Publication date
DE2361721A1 (de) 1974-10-17
US3919490A (en) 1975-11-11
IT1003170B (it) 1976-06-10

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