[go: up one dir, main page]

FR820425A - Electromagnetic wave selection systems, for example - Google Patents

Electromagnetic wave selection systems, for example

Info

Publication number
FR820425A
FR820425A FR820425DA FR820425A FR 820425 A FR820425 A FR 820425A FR 820425D A FR820425D A FR 820425DA FR 820425 A FR820425 A FR 820425A
Authority
FR
France
Prior art keywords
electromagnetic wave
selection systems
wave selection
systems
electromagnetic
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)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR820425A publication Critical patent/FR820425A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/46—Filters

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Aerials With Secondary Devices (AREA)
FR820425D 1936-07-18 1936-07-18 Electromagnetic wave selection systems, for example Expired FR820425A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR820425T 1936-07-18

Publications (1)

Publication Number Publication Date
FR820425A true FR820425A (en) 1937-11-10

Family

ID=9271955

Family Applications (1)

Application Number Title Priority Date Filing Date
FR820425D Expired FR820425A (en) 1936-07-18 1936-07-18 Electromagnetic wave selection systems, for example

Country Status (3)

Country Link
US (1) US2169304A (en)
FR (1) FR820425A (en)
GB (1) GB499142A (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632521A (en) * 1953-03-24 Frequency selector
US2435595A (en) * 1942-02-19 1948-02-10 Bell Telephone Labor Inc High-power compressional wave radiator
US2658186A (en) * 1942-03-12 1953-11-03 Bell Telephone Labor Inc Prismatic directional and object locating system
US2423459A (en) * 1942-09-15 1947-07-08 Bell Telephone Labor Inc Frequency selective apparatus
US2434278A (en) * 1943-03-04 1948-01-13 Bell Telephone Labor Inc Submarine detecting device
US3016513A (en) * 1943-05-26 1962-01-09 Karl S Van Dyke Fm echo-ranging system
US2434667A (en) * 1943-06-05 1948-01-20 Bell Telephone Labor Inc Ultrasonic prism
US2421026A (en) * 1943-07-08 1947-05-27 Bell Telephone Labor Inc Delay device
US2438936A (en) * 1943-10-06 1948-04-06 Bell Telephone Labor Inc Electromechanical transducer
US2455389A (en) * 1944-02-14 1948-12-07 William H Woodin Jr Method and apparatus for separating audio frequencies
US2416338A (en) * 1945-04-11 1947-02-25 Bell Telephone Labor Inc Frequency selective system
US2935728A (en) * 1946-02-15 1960-05-03 Rca Corp Underwater object locator
US2539535A (en) * 1946-03-16 1951-01-30 Bell Telephone Labor Inc Source of electrical energy
US2629827A (en) * 1947-10-31 1953-02-24 Eckert Mauchly Comp Corp Memory system
US2643286A (en) * 1950-06-21 1953-06-23 Hurvitz Hyman Spectrum analyzer for compressional waves
US2936416A (en) * 1954-06-11 1960-05-10 Hurvitz Hyman Frequency indicator
GB988102A (en) * 1962-08-03 1965-04-07 Marconi Co Ltd Improvements in or relating to wave-energy delay cells
US3522557A (en) * 1963-07-19 1970-08-04 Bell Telephone Labor Inc Acoustic delay line
US3293574A (en) * 1963-11-20 1966-12-20 Goodyear Aerospace Corp Diffraction delay line for pulse expansion and compression
FR657592A (en) * 1963-12-24 1929-06-06 Flue improvements
US3696313A (en) * 1970-07-29 1972-10-03 Zenith Radio Corp Arrangement for converting between acoustic compressional waves and surface waves
DE2742492C3 (en) * 1977-03-24 1984-07-19 Kohji Yokosuka Kanagawa Toda Ultrasonic transducer
FR2620294B1 (en) * 1987-09-07 1990-01-19 Technomed Int Sa PIEZOELECTRIC DEVICE WITH REDUCED NEGATIVE WAVES, AND USE THEREOF FOR EXTRA-BODY LITHOTRITIS OR FOR THE DESTRUCTION OF SPECIAL TISSUES
US7541240B2 (en) 2005-10-18 2009-06-02 Sandisk Corporation Integration process flow for flash devices with low gap fill aspect ratio

Also Published As

Publication number Publication date
GB499142A (en) 1939-01-16
US2169304A (en) 1939-08-15

Similar Documents

Publication Publication Date Title
FR820425A (en) Electromagnetic wave selection systems, for example
FR837953A (en) Electromagnetic wave propagation direction indicating systems, for example
FR828571A (en) Electromagnetic wave transmission systems
FR836633A (en) Antenna systems
FR842933A (en) Guided wave system
FR828300A (en) Radio wave guidance systems
FR812253A (en) Improvements to antenna systems
FR867725A (en) High frequency electromagnetic wave receiver systems
FR861289A (en) Wave transmission systems
FR822127A (en) Receiving systems for modulated carrier waves
FR818511A (en) Ultra-short electromagnetic wave signaling systems
FR833669A (en) Electric wave translator systems
FR821125A (en) Aerial systems
FR865592A (en) Electric wave amplifier systems
FR811400A (en) Guidance systems using radio waves, for example for landing planes with no outside visibility
FR822129A (en) Wave transmission systems
FR824728A (en) Carrier wave modulation systems
FR831751A (en) Wave amplifier systems
FR822799A (en) Carrier wave transmission systems
FR816120A (en) Guidance systems using radio waves, for example for landing airplanes without outside visibility
FR851596A (en) Antenna systems
FR806782A (en) Improvements to antenna systems
FR820499A (en) Electromagnetic wave transmission system
FR831479A (en) Directional antenna systems
FR823787A (en) Carrier wave receiver systems