NL32969C - - Google Patents

Info

Publication number
NL32969C
NL32969C NL32969DA NL32969C NL 32969 C NL32969 C NL 32969C NL 32969D A NL32969D A NL 32969DA NL 32969 C NL32969 C NL 32969C
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 NL32969C publication Critical patent/NL32969C/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)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
NL32969D 1931-04-16 NL32969C (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB149526D DE610049C (de) 1931-04-16 1931-04-16 Vorrichtung zum Suchen und Verfolgen einer beweglichen Schallquelle bei Nacht

Publications (1)

Publication Number Publication Date
NL32969C true NL32969C (xx)

Family

ID=7001972

Family Applications (1)

Application Number Title Priority Date Filing Date
NL32969D NL32969C (xx) 1931-04-16

Country Status (2)

Country Link
DE (1) DE610049C (xx)
NL (1) NL32969C (xx)

Also Published As

Publication number Publication date
DE610049C (de) 1935-03-01

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