BE422902A - - Google Patents

Info

Publication number
BE422902A
BE422902A BE422902DA BE422902A BE 422902 A BE422902 A BE 422902A BE 422902D A BE422902D A BE 422902DA BE 422902 A BE422902 A BE 422902A
Authority
BE
Belgium
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 BE422902A publication Critical patent/BE422902A/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)
BE422902D 1937-07-31 BE422902A (en)van)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR825083T 1937-07-31

Publications (1)

Publication Number Publication Date
BE422902A true BE422902A (en)van)

Family

ID=9282151

Family Applications (1)

Application Number Title Priority Date Filing Date
BE422902D BE422902A (en)van) 1937-07-31

Country Status (2)

Country Link
BE (1) BE422902A (en)van)
FR (1) FR825083A (en)van)

Also Published As

Publication number Publication date
FR825083A (fr) 1938-02-23

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