FR517844A - Dispositif acoustique - Google Patents

Dispositif acoustique

Info

Publication number
FR517844A
FR517844A FR517844A FR517844DA FR517844A FR 517844 A FR517844 A FR 517844A FR 517844 A FR517844 A FR 517844A FR 517844D A FR517844D A FR 517844DA FR 517844 A FR517844 A FR 517844A
Authority
FR
France
Prior art keywords
acoustic device
acoustic
Prior art date
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
FR517844A
Other languages
English (en)
Inventor
Hans Hohner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of FR517844A publication Critical patent/FR517844A/fr
Expired legal-status Critical Current

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)
FR517844A 1919-01-22 1919-01-22 Dispositif acoustique Expired FR517844A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR517844T 1919-01-22

Publications (1)

Publication Number Publication Date
FR517844A true FR517844A (fr) 1921-05-12

Family

ID=8915979

Family Applications (1)

Application Number Title Priority Date Filing Date
FR517844A Expired FR517844A (fr) 1919-01-22 1919-01-22 Dispositif acoustique

Country Status (1)

Country Link
FR (1) FR517844A (fr)

Similar Documents

Publication Publication Date Title
FR510113A (fr) Dispositif de scellement
FR504597A (fr) Dispositif de roulement
NL9556C (nl) Alarmeertoestel
FR517844A (fr) Dispositif acoustique
FR538377A (fr) Dispositif de clavetage
FR537465A (fr) Dispositif de démultiplication
FR519824A (fr) Dispositif de projection en relief
FR22938E (fr) Dispositif de projection en relief
FR523818A (fr) Dispositif de télémécanique
FR505961A (fr) Dispositif de bouchon-jauge
FR502660A (fr) Dispositif de suspension
FR23835E (fr) Appareil fumivore
FR504464A (fr) Dispositif de phonographe perfectionné
FR540551A (fr) Dispositif aéronautique
FR504924A (fr) Dispositif de combustion
FR521661A (fr) Dispositif perfectionné de pipe
FR498215A (fr) Dispositif pour inhalations
CH95388A (de) Messgerät.
CH83605A (de) Alarmvorrichtung
CH81859A (de) Signalapparat
FR498834A (fr) Dispositif de mesurage
FR509661A (fr) Dispositif de tirage induit
FR23921E (fr) Dispositif de tirage induit
FR518514A (fr) Appareil pousse-wagonnet
FR507896A (fr) Appareil rode-soupape