BE545710A - - Google Patents

Info

Publication number
BE545710A
BE545710A BE545710DA BE545710A BE 545710 A BE545710 A BE 545710A BE 545710D A BE545710D A BE 545710DA BE 545710 A BE545710 A BE 545710A
Authority
BE
Belgium
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
Publication of BE545710A publication Critical patent/BE545710A/xx

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02Electrodes; Magnetic control means; Screens
    • H01J23/08Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087Magnetic focusing arrangements
    • H01J23/0876Magnetic focusing arrangements with arrangements improving the linearity and homogeniety of the axial field, e.g. field straightener
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/14Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by electrical means
    • B05D3/141Plasma treatment
    • B05D3/142Pretreatment
    • B05D3/144Pretreatment of polymeric substrates
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G81/00Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
    • C08G81/02Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C08G81/021Block or graft polymers containing only sequences of polymers of C08C or C08F
    • C08G81/022Block or graft polymers containing only sequences of polymers of C08C or C08F containing sequences of polymers of conjugated dienes and of polymers of alkenyl aromatic compounds
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04Coating
    • C08J7/0427Coating with only one layer of a composition containing a polymer binder
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02Electrodes; Magnetic control means; Screens
    • H01J23/06Electron or ion guns
    • H01J23/065Electron or ion guns producing a solid cylindrical beam
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02Electrodes; Magnetic control means; Screens
    • H01J23/08Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/083Electrostatic focusing arrangements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02Electrodes; Magnetic control means; Screens
    • H01J23/08Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087Magnetic focusing arrangements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/16Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/24Slow-wave structures, e.g. delay systems
    • H01J23/26Helical slow-wave structures; Adjustment therefor
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/16Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/24Slow-wave structures, e.g. delay systems
    • H01J23/30Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/36Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/40Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H01J23/42Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit the interaction circuit being a helix or a helix-derived slow-wave structure
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/36Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/40Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H01J23/48Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit for linking interaction circuit with coaxial lines; Devices of the coupled helices type
    • H01J23/50Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit for linking interaction circuit with coaxial lines; Devices of the coupled helices type the interaction circuit being a helix or derived from a helix
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/34Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/36Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
    • H01J25/38Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the forward travelling wave being utilised
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00Coupling devices of the waveguide type
    • H01P5/08Coupling devices of the waveguide type for linking dissimilar lines or devices
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08Helical antennas
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03CMODULATION
    • H03C3/00Angle modulation
    • H03C3/30Angle modulation by means of transit-time tube
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2/00Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
    • H03H2/005Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
    • H03H2/006Transmitter or amplifier output circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M19/00Current supply arrangements for telephone systems
    • H04M19/02Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M5/00Manual exchanges
    • H04M5/04Arrangements for indicating calls or supervising connections for calling or clearing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q3/00Selecting arrangements
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/04Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2327/06Homopolymers or copolymers of vinyl chloride
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2429/00Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Microwave Tubes (AREA)
  • Waveguides (AREA)
  • Communication Cables (AREA)
  • Details Of Aerials (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Particle Accelerators (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
BE545710D 1952-04-08 BE545710A (fr)

Applications Claiming Priority (18)

Application Number Priority Date Filing Date Title
US776923XA 1952-04-08 1952-04-08
DE316934X 1952-04-08
DE734963X 1952-07-05
US740852XA 1952-08-19 1952-08-19
US778846XA 1952-08-19 1952-08-19
US773393XA 1952-08-21 1952-08-21
US773783XA 1952-08-23 1952-08-23
US777224XA 1952-09-29 1952-09-29
US777225XA 1952-10-11 1952-10-11
US773394XA 1952-10-31 1952-10-31
DE745099X 1952-11-07
US756370XA 1952-11-19 1952-11-19
US754861XA 1953-04-01 1953-04-01
DE780806X 1953-04-18
DE771189X 1953-11-27
DE767078X 1954-04-03
US861229XA 1956-10-26 1956-10-26
US886318XA 1957-05-03 1957-05-03

Publications (1)

Publication Number Publication Date
BE545710A true BE545710A (fr) 1900-01-01

Family

ID=31982865

Family Applications (15)

Application Number Title Priority Date Filing Date
BE528213D BE528213A (fr) 1952-04-08
BE521167D BE521167A (fr) 1952-04-08
BE523425D BE523425A (fr) 1952-04-08
BE523177D BE523177A (fr) 1952-04-08
BE534531D BE534531A (fr) 1952-04-08
BE527787D BE527787A (fr) 1952-04-08
BE545710D BE545710A (fr) 1952-04-08
BE524061D BE524061A (fr) 1952-04-08
BE523116D BE523116A (fr) 1952-04-08
BE524397D BE524397A (fr) 1952-04-08
BE522186D BE522186A (fr) 1952-04-08
BE523897D BE523897A (fr) 1952-04-08
BE522303D BE522303A (fr) 1952-04-08
BE523117D BE523117A (fr) 1952-04-08
BE519037D BE519037A (fr) 1952-04-08

Family Applications Before (6)

Application Number Title Priority Date Filing Date
BE528213D BE528213A (fr) 1952-04-08
BE521167D BE521167A (fr) 1952-04-08
BE523425D BE523425A (fr) 1952-04-08
BE523177D BE523177A (fr) 1952-04-08
BE534531D BE534531A (fr) 1952-04-08
BE527787D BE527787A (fr) 1952-04-08

Family Applications After (8)

Application Number Title Priority Date Filing Date
BE524061D BE524061A (fr) 1952-04-08
BE523116D BE523116A (fr) 1952-04-08
BE524397D BE524397A (fr) 1952-04-08
BE522186D BE522186A (fr) 1952-04-08
BE523897D BE523897A (fr) 1952-04-08
BE522303D BE522303A (fr) 1952-04-08
BE523117D BE523117A (fr) 1952-04-08
BE519037D BE519037A (fr) 1952-04-08

Country Status (7)

Country Link
US (4) US2843789A (fr)
BE (15) BE519037A (fr)
CH (8) CH316934A (fr)
DE (2) DE963704C (fr)
FR (18) FR65473E (fr)
GB (20) GB734963A (fr)
NL (3) NL196187A (fr)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3136964A (en) * 1954-05-12 1964-06-09 High Voltage Engineering Corp Radio frequency coupler and attenuator
NL197957C (fr) * 1954-08-05
US2925508A (en) * 1955-07-28 1960-02-16 Sperry Rand Corp Electron beam focusing structure
US2991391A (en) * 1957-07-24 1961-07-04 Varian Associates Electron beam discharge apparatus
US2966609A (en) * 1957-11-22 1960-12-27 Gen Electric Magnetic structures for high frequency energy interchange apparatus
NL105112C (fr) * 1958-05-15
US3133227A (en) * 1958-06-25 1964-05-12 Varian Associates Linear particle accelerator apparatus for high energy particle beams provided with pulsing means for the control electrode
DE1136425B (de) * 1959-07-17 1962-09-13 Philips Nv Anordnung zum Ankoppeln der wendelfoermigen Verzoegerungsleitung einer Lauffeldroehre an einen quer zur Wendelachse verlaufenden Hohlleiter
US3250946A (en) * 1961-02-07 1966-05-10 Philips Corp Travelling wave tube, in which an electron beam interacts with a helical delay line, having spurious oscillation suppressing means
US3274429A (en) * 1963-03-18 1966-09-20 Varian Associates High frequency electron discharge device with heat dissipation means
US3269611A (en) * 1964-02-04 1966-08-30 Komarek Greaves And Company Feeding mechanism
US3404306A (en) * 1966-04-06 1968-10-01 Alltronics Inc Traveling-wave tube focusing field straightener
DE1541040B1 (de) * 1966-05-16 1971-08-26 Siemens Ag Wanderfeldroehre mit zwei den hochfrequenzeingang und aus gang der roehre fildenden aeusseren wellenleitern
US3466493A (en) * 1967-02-21 1969-09-09 Varian Associates Circuit sever for ppm focused traveling wave tubes
FR1522411A (fr) * 1967-03-14 1968-04-26 Csf Compensation des effets de la température dans les focalisateurs magnétiques
GB1189615A (en) * 1968-03-21 1970-04-29 English Electric Valve Co Ltd Improvements in or relating to Travelling Wave Tubes.
US3544832A (en) * 1968-07-18 1970-12-01 Rca Corp Traveling wave tube with evaporated nickel attenuator coating and method of manufacture thereof
FR2137311B1 (fr) * 1971-05-18 1973-05-11 Thomson Csf
JPS5580851U (fr) * 1978-11-29 1980-06-04
WO1987004864A1 (fr) * 1986-02-08 1987-08-13 Teldix Gmbh Commutateur de guide d'ondes
US4945320A (en) * 1986-02-18 1990-07-31 Teldix Gmbh Microwave switch having at least two switching positions
FR2711277B1 (fr) * 1993-10-14 1995-11-10 Alcatel Mobile Comm France Antenne du type pour dispositif radio portable, procédé de fabrication d'une telle antenne et dispositif radio portable comportant une telle antenne.
GB9418028D0 (en) * 1994-09-07 1994-10-26 Eev Ltd Cavity arrangements
GB2296370B (en) * 1994-12-19 1998-07-29 Eev Ltd Travelling wave tubes
US5596797A (en) * 1995-04-03 1997-01-28 D & M Plastics Corporation Method and apparatus for making a molded cellular antenna coil
KR20190046029A (ko) * 2017-10-25 2019-05-07 삼성전기주식회사 안테나 장치 및 이를 구비하는 휴대 단말기
CN112692542B (zh) * 2020-12-31 2023-03-17 山东微波电真空技术有限公司 螺旋线、夹持杆及管壳的自动装配设备

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2064469A (en) * 1933-10-23 1936-12-15 Rca Corp Device for and method of controlling high frequency currents
US2131192A (en) * 1934-05-09 1938-09-27 Loewe Opta Gmbh High vacuum television tube
GB515308A (en) * 1938-05-25 1939-12-01 Miller Harold Improvements in or relating to magnetic electron lenses
BE436805A (fr) * 1938-10-26
USRE22389E (en) * 1940-07-13 1943-11-02 Electron beam concentrating
US2413609A (en) * 1945-03-12 1946-12-31 Hazeltine Research Inc Time-delay network
NL76331C (fr) * 1946-01-11 Western Electric Co
NL135247C (fr) * 1946-10-22
NL74575C (fr) * 1946-10-23
US2611101A (en) * 1947-04-15 1952-09-16 Wallauschek Richard Traeling wave amplifier tube
US2679019A (en) * 1947-12-02 1954-05-18 Rca Corp High-frequency electron discharge device
US2660690A (en) * 1948-10-15 1953-11-24 Sylvania Electric Prod Traveling wave tube
US2730647A (en) * 1949-06-22 1956-01-10 Bell Telephone Labor Inc Microwave amplifier
US2585582A (en) * 1949-07-07 1952-02-12 Bell Telephone Labor Inc Electron gun
GB696058A (en) * 1949-07-15 1953-08-26 Nat Res Dev Improvements in electron discharge tubes
FR1012374A (fr) * 1949-07-27 1952-07-09 Perfectionnements à la construction des tubes électroniques à ondes progressives
GB664663A (en) * 1949-09-01 1952-01-09 Mullard Radio Valve Co Ltd Improvements in travelling wave tubes
US2649578A (en) * 1949-12-02 1953-08-18 Bell Telephone Labor Inc Wave-guide elbow
US2749472A (en) * 1952-01-02 1956-06-05 Univ Leland Stanford Junior Travelling wave tubes

Also Published As

Publication number Publication date
GB861229A (en) 1961-02-15
GB778846A (en) 1957-07-10
GB756370A (en) 1956-09-05
DE963704C (de) 1957-05-09
GB780806A (en) 1957-08-07
US2857547A (en) 1958-10-21
CH330643A (fr) 1958-06-15
NL95555C (fr) 1900-01-01
FR65589E (fr) 1956-02-28
CH316934A (de) 1956-10-31
CH329897A (fr) 1958-05-15
FR68804E (fr) 1958-06-10
GB777224A (en) 1957-06-19
BE523177A (fr) 1900-01-01
BE534531A (fr) 1900-01-01
BE523897A (fr) 1900-01-01
FR65606E (fr) 1956-02-29
FR68407E (fr) 1958-04-30
FR65608E (fr) 1956-02-29
FR66230E (fr) 1956-06-05
FR69068E (fr) 1958-09-22
GB771189A (en) 1957-03-27
FR65473E (fr) 1956-02-21
GB767078A (en) 1957-01-30
US2812469A (en) 1957-11-05
FR68403E (fr) 1958-04-30
BE519037A (fr) 1900-01-01
BE524061A (fr) 1900-01-01
US2911599A (en) 1959-11-03
GB773783A (en) 1957-05-01
BE523117A (fr) 1900-01-01
CH333699A (de) 1958-10-31
BE528213A (fr) 1900-01-01
FR69062E (fr) 1958-09-22
GB773394A (en) 1957-04-24
FR65616E (fr) 1956-02-29
GB754861A (en) 1956-08-15
BE527787A (fr) 1900-01-01
BE523425A (fr) 1900-01-01
CH317676A (de) 1956-11-30
GB776923A (en) 1957-06-12
BE522186A (fr) 1900-01-01
GB886318A (en) 1962-01-03
US2843789A (en) 1958-07-15
FR66421E (fr) 1957-02-27
GB766790A (en) 1957-01-23
GB773393A (en) 1957-04-24
GB734963A (en) 1955-08-10
FR66233E (fr) 1956-06-05
GB777225A (en) 1957-06-19
CH335353A (fr) 1958-12-31
NL98392C (fr) 1900-01-01
GB745099A (en) 1956-02-22
BE524397A (fr) 1900-01-01
BE522303A (fr) 1900-01-01
CH334111A (fr) 1958-11-15
FR68807E (fr) 1958-06-10
GB810267A (en) 1959-03-11
GB754563A (en) 1956-08-08
BE521167A (fr) 1900-01-01
GB740852A (en) 1955-11-23
CH322499A (de) 1957-06-15
NL196187A (fr) 1900-01-01
FR65591E (fr) 1956-02-28
FR65607E (fr) 1956-02-29
FR66228E (fr) 1956-06-05
FR68404E (fr) 1958-04-30
DE1080702B (de) 1960-04-28
BE523116A (fr) 1900-01-01

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