NL28962C - - Google Patents

Info

Publication number
NL28962C
NL28962C NL28962DA NL28962C NL 28962 C NL28962 C NL 28962C NL 28962D A NL28962D A NL 28962DA NL 28962 C NL28962 C NL 28962C
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 NL28962C publication Critical patent/NL28962C/xx

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Geophysics And Detection Of Objects (AREA)
NL28962D 1929-03-13 NL28962C (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES90465D DE542483C (de) 1929-03-13 1929-03-13 Vorrichtung zur Richtungsbestimmung von Schallwellen

Publications (1)

Publication Number Publication Date
NL28962C true NL28962C (enrdf_load_stackoverflow)

Family

ID=7515833

Family Applications (1)

Application Number Title Priority Date Filing Date
NL28962D NL28962C (enrdf_load_stackoverflow) 1929-03-13

Country Status (2)

Country Link
DE (1) DE542483C (enrdf_load_stackoverflow)
NL (1) NL28962C (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2987700A (en) * 1943-09-02 1961-06-06 John N A Hawkins Differentially sensitive sonic detector

Also Published As

Publication number Publication date
DE542483C (de) 1932-01-25

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