NL27077C - - Google Patents

Info

Publication number
NL27077C
NL27077C NL27077DA NL27077C NL 27077 C NL27077 C NL 27077C NL 27077D A NL27077D A NL 27077DA NL 27077 C NL27077 C NL 27077C
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 NL27077C publication Critical patent/NL27077C/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Networks Using Active Elements (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
NL27077D 1927-12-15 NL27077C (enrdf_load_html_response)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US240116A US1725566A (en) 1927-12-15 1927-12-15 Secret communication system
GB230/28A GB309063A (en) 1927-12-15 1928-01-03 Improvements in secret electric signalling systems

Publications (1)

Publication Number Publication Date
NL27077C true NL27077C (enrdf_load_html_response)

Family

ID=26235775

Family Applications (1)

Application Number Title Priority Date Filing Date
NL27077D NL27077C (enrdf_load_html_response) 1927-12-15

Country Status (4)

Country Link
US (1) US1725566A (enrdf_load_html_response)
DE (1) DE542428C (enrdf_load_html_response)
GB (1) GB309063A (enrdf_load_html_response)
NL (1) NL27077C (enrdf_load_html_response)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495727A (en) * 1943-01-07 1950-01-31 Hutchinson Henry Parks Speech privacy apparatus
CH246844A (de) * 1945-09-15 1947-01-31 Patelhold Patentverwertung Verfahren und Einrichtung zur Verschleierung von elektrisch übermittelten Sprachnachrichten.
CH248975A (de) * 1946-02-04 1947-05-31 Patelhold Patentverwertung Verfahren und Einrichtung zur Verschleierung der einzelnen Gespräche einer Mehrkanalanlage.
US2574326A (en) * 1947-12-02 1951-11-06 Rca Corp Generating groups of currents
US3183304A (en) * 1962-03-07 1965-05-11 Bell Telephone Labor Inc Sound amplification system
DE1273002B (de) * 1963-09-11 1968-07-18 Siemens Ag Einrichtung zur verschluesselten UEbertragung von Sprachsignalen durch Vertauschung von Teilbaendern
US6047543A (en) * 1996-12-18 2000-04-11 Litex, Inc. Method and apparatus for enhancing the rate and efficiency of gas phase reactions

Also Published As

Publication number Publication date
GB309063A (en) 1929-04-03
US1725566A (en) 1929-08-20
DE542428C (de) 1932-01-27

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