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NL50811C - - Google Patents

Info

Publication number
NL50811C
NL50811C NL50811DA NL50811C NL 50811 C NL50811 C NL 50811C NL 50811D A NL50811D A NL 50811DA NL 50811 C NL50811 C NL 50811C
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 NL50811C publication Critical patent/NL50811C/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)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
NL50811D 1939-04-17 NL50811C (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1163939A GB527737A (en) 1939-04-17 1939-04-17 Recording apparatus for the measurement of distance by the echo-sounding method

Publications (1)

Publication Number Publication Date
NL50811C true NL50811C (zh)

Family

ID=9989963

Family Applications (1)

Application Number Title Priority Date Filing Date
NL50811D NL50811C (zh) 1939-04-17

Country Status (2)

Country Link
GB (1) GB527737A (zh)
NL (1) NL50811C (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2534820A (en) * 1947-05-20 1950-12-19 Panoramic Radio Corp Radar azimuth and distance indication recorder
US2892667A (en) * 1955-06-03 1959-06-30 Robert A Hermann Range and bearing sonar recording device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2534820A (en) * 1947-05-20 1950-12-19 Panoramic Radio Corp Radar azimuth and distance indication recorder
US2892667A (en) * 1955-06-03 1959-06-30 Robert A Hermann Range and bearing sonar recording device

Also Published As

Publication number Publication date
GB527737A (en) 1940-10-15

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