BE385619A - - Google Patents

Info

Publication number
BE385619A
BE385619A BE385619DA BE385619A BE 385619 A BE385619 A BE 385619A BE 385619D A BE385619D A BE 385619DA BE 385619 A BE385619 A BE 385619A
Authority
BE
Belgium
Prior art keywords
emi
graph
listening device
scale
projector
Prior art date
Application number
Other languages
English (en)
French (fr)
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 BE385619A publication Critical patent/BE385619A/fr

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)
  • Rehabilitation Tools (AREA)
BE385619D 1931-04-01 BE385619A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR729987T 1931-04-01

Publications (1)

Publication Number Publication Date
BE385619A true BE385619A (xx)

Family

ID=9112801

Family Applications (1)

Application Number Title Priority Date Filing Date
BE385619D BE385619A (xx) 1931-04-01

Country Status (2)

Country Link
BE (1) BE385619A (xx)
FR (1) FR729987A (xx)

Also Published As

Publication number Publication date
FR729987A (fr) 1932-08-04

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