NL49757C - - Google Patents

Info

Publication number
NL49757C
NL49757C NL49757DA NL49757C NL 49757 C NL49757 C NL 49757C NL 49757D A NL49757D A NL 49757DA NL 49757 C NL49757 C NL 49757C
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 NL49757C publication Critical patent/NL49757C/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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
NL49757D 1936-08-14 NL49757C (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB230160X 1936-08-14

Publications (1)

Publication Number Publication Date
NL49757C true NL49757C (enrdf_load_stackoverflow)

Family

ID=10188719

Family Applications (1)

Application Number Title Priority Date Filing Date
NL49757D NL49757C (enrdf_load_stackoverflow) 1936-08-14

Country Status (5)

Country Link
BE (1) BE422659A (enrdf_load_stackoverflow)
CH (1) CH230160A (enrdf_load_stackoverflow)
FR (1) FR825569A (enrdf_load_stackoverflow)
GB (1) GB479881A (enrdf_load_stackoverflow)
NL (1) NL49757C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
CH230160A (de) 1943-12-15
BE422659A (enrdf_load_stackoverflow)
FR825569A (fr) 1938-03-07
GB479881A (en) 1938-02-14

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