FR541202A - - Google Patents

Info

Publication number
FR541202A
FR541202A FR541202DA FR541202A FR 541202 A FR541202 A FR 541202A FR 541202D A FR541202D A FR 541202DA FR 541202 A FR541202 A FR 541202A
Authority
FR
France
Legal status (The legal status 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 status listed.)
Expired
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 date
Application granted granted Critical
Publication of FR541202A publication Critical patent/FR541202A/fr
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S1/00Beacons 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
    • G01S1/72Beacons 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)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR541202D 1915-07-10 Expired FR541202A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE309148T 1915-07-10

Publications (1)

Publication Number Publication Date
FR541202A true FR541202A (fr) 1922-07-25

Family

ID=31501678

Family Applications (1)

Application Number Title Priority Date Filing Date
FR541202D Expired FR541202A (fr) 1915-07-10

Country Status (5)

Country Link
US (1) US1636576A (fr)
DE (2) DE298528C (fr)
FR (1) FR541202A (fr)
GB (2) GB148422A (fr)
NL (1) NL9571C (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2449085A (en) * 1944-12-12 1948-09-14 United Geophysical Company Inc Submersible seismometer system

Also Published As

Publication number Publication date
US1636576A (en) 1927-07-19
DE298528C (fr)
DE309148C (fr)
GB148429A (en) 1921-10-10
GB148422A (en) 1921-10-10
NL9571C (fr)

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