CH258727A - Fernmeldeanlage. - Google Patents

Fernmeldeanlage.

Info

Publication number
CH258727A
CH258727A CH258727DA CH258727A CH 258727 A CH258727 A CH 258727A CH 258727D A CH258727D A CH 258727DA CH 258727 A CH258727 A CH 258727A
Authority
CH
Switzerland
Prior art keywords
telecommunication system
telecommunication
Prior art date
Application number
Other languages
English (en)
Inventor
Ag Standard Telephon Und Radio
Original Assignee
Standard Telephon & Radio Ag
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 Standard Telephon & Radio Ag filed Critical Standard Telephon & Radio Ag
Publication of CH258727A publication Critical patent/CH258727A/de

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D307/38—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D307/40—Radicals substituted by oxygen atoms
    • C07D307/46—Doubly bound oxygen atoms, or two oxygen atoms singly bound to the same carbon atom
    • C07D307/48—Furfural
    • C07D307/50—Preparation from natural products
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Telephonic Communication Services (AREA)
CH258727D 1944-04-04 1945-06-04 Fernmeldeanlage. CH258727A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US529506A US2524773A (en) 1944-04-04 1944-04-04 Calling party identification for automatic telephone systems

Publications (1)

Publication Number Publication Date
CH258727A true CH258727A (de) 1948-12-15

Family

ID=24110189

Family Applications (1)

Application Number Title Priority Date Filing Date
CH258727D CH258727A (de) 1944-04-04 1945-06-04 Fernmeldeanlage.

Country Status (5)

Country Link
US (1) US2524773A (de)
CH (1) CH258727A (de)
FR (1) FR920968A (de)
GB (1) GB597163A (de)
NL (1) NL65873C (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE522252A (de) * 1952-08-23
US2806091A (en) * 1953-02-27 1957-09-10 Bell Telephone Labor Inc Multiparty identification system
US2820100A (en) * 1954-02-26 1958-01-14 Bell Telephone Labor Inc Station identification device
US2817710A (en) * 1954-07-14 1957-12-24 Bell Telephone Labor Inc Multiparty telephone system
US3046349A (en) * 1959-04-27 1962-07-24 Automatic Elect Lab Station identification apparatus
US3070664A (en) * 1959-12-04 1962-12-25 Automatic Elect Lab Calling party identification systems

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2281508A (en) * 1940-02-02 1942-04-28 Bell Telephone Labor Inc Telephone system
US2306173A (en) * 1940-06-12 1942-12-22 Bell Telephone Labor Inc Telephone system
US2277206A (en) * 1940-06-22 1942-03-24 Bell Telephone Labor Inc Key sender
US2326679A (en) * 1940-07-11 1943-08-10 Bell Telephone Labor Inc Party line telephone system
US2410520A (en) * 1941-07-26 1946-11-05 Automatic Elect Lab Telephone system
US2347108A (en) * 1943-02-05 1944-04-18 Bell Telephone Labor Inc Call transmitter for telephone signaling systems
US2406001A (en) * 1944-02-24 1946-08-20 Int Standard Electric Corp Electrical signaling system

Also Published As

Publication number Publication date
NL65873C (de) 1950-06-15
GB597163A (en) 1948-01-20
US2524773A (en) 1950-10-10
FR920968A (fr) 1947-04-23

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