FR672594A - Improvements to acoustic sounding devices - Google Patents

Improvements to acoustic sounding devices

Info

Publication number
FR672594A
FR672594A FR672594DA FR672594A FR 672594 A FR672594 A FR 672594A FR 672594D A FR672594D A FR 672594DA FR 672594 A FR672594 A FR 672594A
Authority
FR
France
Prior art keywords
acoustic sounding
sounding devices
devices
acoustic
sounding
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
Other languages
French (fr)
Inventor
Pierre-Auguste-Danie Marti
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 filed Critical
Application granted granted Critical
Publication of FR672594A publication Critical patent/FR672594A/en
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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/56—Display arrangements
    • G01S7/60—Display arrangements for providing a permanent recording

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
FR672594D 1929-04-05 1929-04-05 Improvements to acoustic sounding devices Expired FR672594A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR672594T 1929-04-05

Publications (1)

Publication Number Publication Date
FR672594A true FR672594A (en) 1929-12-30

Family

ID=9017575

Family Applications (1)

Application Number Title Priority Date Filing Date
FR672594D Expired FR672594A (en) 1929-04-05 1929-04-05 Improvements to acoustic sounding devices

Country Status (1)

Country Link
FR (1) FR672594A (en)

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