JPS331003B1 - - Google Patents

Info

Publication number
JPS331003B1
JPS331003B1 JP1309955A JP1309955A JPS331003B1 JP S331003 B1 JPS331003 B1 JP S331003B1 JP 1309955 A JP1309955 A JP 1309955A JP 1309955 A JP1309955 A JP 1309955A JP S331003 B1 JPS331003 B1 JP S331003B1
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
JP1309955A
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
Publication of JPS331003B1 publication Critical patent/JPS331003B1/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
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
JP1309955A 1954-07-16 1955-05-11 Pending JPS331003B1 (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US443792A US2801287A (en) 1954-07-16 1954-07-16 Control of regular and distant talking subscribers sets

Publications (1)

Publication Number Publication Date
JPS331003B1 true JPS331003B1 (ja) 1958-02-18

Family

ID=23762223

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1309955A Pending JPS331003B1 (ja) 1954-07-16 1955-05-11

Country Status (6)

Country Link
US (1) US2801287A (ja)
JP (1) JPS331003B1 (ja)
BE (1) BE539848A (ja)
DE (1) DE1032791B (ja)
FR (1) FR1122352A (ja)
GB (1) GB777184A (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2895007A (en) * 1955-11-03 1959-07-14 Ericsson Telefon Ab L M Telephone installation
US2877302A (en) * 1956-04-23 1959-03-10 Gai Tronics Corp Telephone equipment
BE560891A (ja) * 1956-10-05
BE560927A (ja) * 1956-10-08
BE563970A (ja) * 1957-01-15
US3011024A (en) * 1958-07-25 1961-11-28 Kastel Lillian Telephone set
USRE25507E (en) * 1959-12-16 1964-01-07 Frequency - cps
DE1141681B (de) * 1961-04-07 1962-12-27 Huettenwerk Oberhausen Ag Fernsprechteilnehmerschaltung fuer Linien-Waehlanlagen mit Freisprecheinrichtung
US3530250A (en) * 1965-06-19 1970-09-22 Agfa Gevaert Ag Telephone monitoring of remotely located areas
SE339833B (ja) * 1970-02-18 1971-10-25 K Blomberg
GB8334012D0 (en) * 1983-12-21 1984-02-01 Gen Electric Co Plc Telephone instruments

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB336946A (en) * 1928-10-10 1930-10-21 Siemens Ag Improvements in circuit arrangements for conference telephones
DE597131C (de) * 1930-09-05 1934-05-17 Siemens & Halske Akt Ges Schaltungsanordnung fuer Konferenzanlagen mit mehreren Haupt- und Nebenstellen
CH192713A (de) * 1936-11-05 1937-08-31 Autophon Ag Umschalteinrichtung zur wahlweisen Führung der Gespräche mit dem Mikrotelephon des Sprechstellen-Apparates oder mit einem Lautsprechertelephon.
US2300044A (en) * 1940-07-23 1942-10-27 American Telephone & Telegraph Telephone subscriber's station
BE468046A (ja) * 1942-10-24
CH240686A (de) * 1942-11-16 1946-01-15 Ag Autophon Vermittlungseinrichtung in elektro-akustischer Übertragungsanlage.
DE887956C (de) * 1950-12-27 1953-08-27 Western Electric Co Schaltungsanordnung zur Regelung des UEbertragungspegels fuer Fernsprechteilnehmerstellen

Also Published As

Publication number Publication date
BE539848A (ja)
GB777184A (en) 1957-06-19
US2801287A (en) 1957-07-30
DE1032791B (de) 1958-06-26
FR1122352A (fr) 1956-09-05

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