NL68563C - - Google Patents

Info

Publication number
NL68563C
NL68563C NL68563DA NL68563C NL 68563 C NL68563 C NL 68563C NL 68563D A NL68563D A NL 68563DA NL 68563 C NL68563 C NL 68563C
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 NL68563C publication Critical patent/NL68563C/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
    • C09J161/04—Condensation polymers of aldehydes or ketones with phenols only
    • C09J161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)
NL68563D 1946-06-15 NL68563C (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL281908X 1946-06-15

Publications (1)

Publication Number Publication Date
NL68563C true NL68563C (en:Method)

Family

ID=19782322

Family Applications (2)

Application Number Title Priority Date Filing Date
NL68563D NL68563C (en:Method) 1946-06-15
NL125930D NL125930C (en:Method) 1946-06-15

Family Applications After (1)

Application Number Title Priority Date Filing Date
NL125930D NL125930C (en:Method) 1946-06-15

Country Status (6)

Country Link
US (1) US2567148A (en:Method)
BE (1) BE483168A (en:Method)
CH (1) CH281908A (en:Method)
FR (1) FR957945A (en:Method)
GB (1) GB648848A (en:Method)
NL (2) NL125930C (en:Method)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE331774A (en:Method) * 1925-03-03
US1673023A (en) * 1926-05-01 1928-06-12 Bell Telephone Labor Inc Carrier-wave repeater
US2117835A (en) * 1936-06-01 1938-05-17 Bell Telephone Labor Inc Telephone signaling system
GB489545A (en) * 1937-01-25 1938-07-25 Standard Telephones Cables Ltd Improvements in or relating to electrical communication systems
US2253393A (en) * 1939-02-04 1941-08-19 Westinghouse Electric & Mfg Co Method of connecting carrier frequency to a double circuit
US2385673A (en) * 1943-07-27 1945-09-25 Gen Electric Carrier current system
US2388001A (en) * 1944-12-07 1945-10-30 Hazeltine Corp Signal-transmission system
US2421727A (en) * 1945-04-09 1947-06-03 Rca Corp Multiplex system having channels added at a relay station

Also Published As

Publication number Publication date
US2567148A (en) 1951-09-04
BE483168A (en:Method)
GB648848A (en) 1951-01-10
FR957945A (en:Method) 1950-02-28
CH281908A (fr) 1952-03-31
NL125930C (en:Method)

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