SE8404023D0 - Skottseker platta - Google Patents

Skottseker platta

Info

Publication number
SE8404023D0
SE8404023D0 SE8404023A SE8404023A SE8404023D0 SE 8404023 D0 SE8404023 D0 SE 8404023D0 SE 8404023 A SE8404023 A SE 8404023A SE 8404023 A SE8404023 A SE 8404023A SE 8404023 D0 SE8404023 D0 SE 8404023D0
Authority
SE
Sweden
Prior art keywords
layer
panel
resin
woven fabric
fabric
Prior art date
Application number
SE8404023A
Other languages
English (en)
Other versions
SE462996B (sv
SE8404023L (sv
Inventor
W Ansite
I Rosenberg
Original Assignee
Figgie Int Inc
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 Figgie Int Inc filed Critical Figgie Int Inc
Publication of SE8404023D0 publication Critical patent/SE8404023D0/sv
Publication of SE8404023L publication Critical patent/SE8404023L/sv
Publication of SE462996B publication Critical patent/SE462996B/sv

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • AHUMAN NECESSITIES
    • A42HEADWEAR
    • A42BHATS; HEAD COVERINGS
    • A42B3/00Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04Parts, details or accessories of helmets
    • A42B3/06Impact-absorbing shells, e.g. of crash helmets
    • A42B3/062Impact-absorbing shells, e.g. of crash helmets with reinforcing means
    • A42B3/063Impact-absorbing shells, e.g. of crash helmets with reinforcing means using layered structures
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B19/00Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica
    • B32B19/06Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica next to a fibrous or filamentary layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00Ancillary operations in connection with laminating processes
    • B32B38/08Impregnating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024Woven fabric
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41HARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H1/00Personal protection gear
    • F41H1/04Protection helmets
    • F41H1/08Protection helmets of plastics; Plastic head-shields
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41HARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00Armour; Armour plates
    • F41H5/02Plate construction
    • F41H5/04Plate construction composed of more than one layer
    • F41H5/0471Layered armour containing fibre- or fabric-reinforced layers
    • F41H5/0485Layered armour containing fibre- or fabric-reinforced layers all the layers being only fibre- or fabric-reinforced layers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02Composition of the impregnated, bonded or embedded layer
    • B32B2260/021Fibrous or filamentary layer
    • B32B2260/023Two or more layers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04Impregnation, embedding, or binder material
    • B32B2260/046Synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02Synthetic macromolecular fibres
    • B32B2262/0261Polyamide fibres
    • B32B2262/0269Aromatic polyamide fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10Inorganic fibres
    • B32B2262/101Glass fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10Inorganic fibres
    • B32B2262/106Carbon fibres, e.g. graphite fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10Inorganic particles
    • B32B2264/102Oxide or hydroxide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2571/00Protective equipment
    • B32B2571/02Protective equipment defensive, e.g. armour plates, anti-ballistic clothing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00Walls, panels
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00Stock material or miscellaneous articles
    • Y10S428/911Penetration resistant layer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24025Superposed movable attached layers or components
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24777Edge feature
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24777Edge feature
    • Y10T428/24785Edge feature including layer embodying mechanically interengaged strands, strand portions or strand-like strips [e.g., weave, knit, etc.]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/25Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/30Self-sustaining carbon mass or layer with impregnant or other layer

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Helmets And Other Head Coverings (AREA)
SE8404023A 1983-08-08 1984-08-08 Skottsaeker platta och saett foer framstaellning av skottsaeker platta SE462996B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/521,125 US4550044A (en) 1983-08-08 1983-08-08 Ballistic resistant armor panel and method of constructing the same

Publications (3)

Publication Number Publication Date
SE8404023D0 true SE8404023D0 (sv) 1984-08-08
SE8404023L SE8404023L (sv) 1985-02-09
SE462996B SE462996B (sv) 1990-09-24

Family

ID=24075470

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8404023A SE462996B (sv) 1983-08-08 1984-08-08 Skottsaeker platta och saett foer framstaellning av skottsaeker platta

Country Status (6)

Country Link
US (1) US4550044A (sv)
DE (1) DE3425634A1 (sv)
FR (1) FR2550621B1 (sv)
GB (1) GB2144973B (sv)
IL (1) IL72129A (sv)
SE (1) SE462996B (sv)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179297A (en) * 1985-08-23 1987-03-04 Tilghman Wheelabrator Ltd Ballistic resistant material
US4674394A (en) * 1985-10-16 1987-06-23 Pro-Tech Armored Products Of New York, Inc. Portable bullet-proof shield
US5157223A (en) * 1985-10-21 1992-10-20 The United States Of America As Represented By The Secretary Of The Air Force Explosive attenuating structure
DE3541571A1 (de) * 1985-11-25 1987-06-04 Schuberth Werk Kg Stahlhelm und verfahren zu seiner herstellung
US4681792A (en) * 1985-12-09 1987-07-21 Allied Corporation Multi-layered flexible fiber-containing articles
GB2198628A (en) * 1986-12-19 1988-06-22 Secr Defence Textile armour
US5190802A (en) * 1989-01-06 1993-03-02 Pilato Louis A Ballistic resistant laminate
DE4031550A1 (de) * 1990-10-05 1992-04-09 Daimler Benz Ag Ballistische schutzpanzerung
JPH05329946A (ja) * 1991-02-13 1993-12-14 Toshiba Corp 繊維強化プラスチック材
GB2253589B (en) * 1991-03-15 1994-12-14 Gentex Corp Assembly for resisting penetration by low speed missiles
US5480706A (en) * 1991-09-05 1996-01-02 Alliedsignal Inc. Fire resistant ballistic resistant composite armor
US6268301B1 (en) 1992-03-25 2001-07-31 Toyobo Co., Ltd. Ballistic-resistant article and process for making the same
WO1994023263A1 (en) * 1993-04-01 1994-10-13 Alliedsignal Inc. Constructions having improved penetration resistance
GB9307231D0 (en) * 1993-04-07 1993-06-02 Courtaulds Aerospace Ltd Composite ballistic armour
GB9307325D0 (en) * 1993-04-07 1993-06-02 Courtaulds Aerospace Ltd Ballistic armour sandwiched composites
DE4423194A1 (de) * 1994-07-01 1996-01-04 Triumph International Ag Verfahren zur Herstellung von Ausformungen in Flächengebilden aus aromatischen Polyamiden
DE4423198A1 (de) * 1994-07-01 1996-01-04 Triumph International Ag Schutzkleidung, besonders antiballistische Damen-Schutzkleidung
US5759658A (en) * 1996-04-26 1998-06-02 Tables International Corporation Composite panels, articles incorporating same and method
US5851932A (en) * 1997-10-06 1998-12-22 Isorco, Inc. Ballistic armor laminate
DE19802242C2 (de) * 1998-01-22 1999-11-11 Akzo Nobel Nv Stich- und Kugelschutzkleidung
NL1010399C1 (nl) * 1998-10-26 2000-04-27 Dsm Nv Werkwijze voor het vervaardigen van een vormdeel.
US6723267B2 (en) 1998-10-28 2004-04-20 Dsm N.V. Process of making highly oriented polyolefin fiber
KR20010038599A (ko) * 1999-10-26 2001-05-15 홍완기 2중구조의 헬멧본체와 그 제조방법
DE10002447C2 (de) * 2000-01-21 2003-11-06 Daimler Chrysler Ag Gepanzerte Fahrzeugtüre
GB0014128D0 (en) * 2000-06-10 2000-08-02 Lorica Research Limited Composite material and use therof
GB0205267D0 (en) * 2002-03-06 2002-04-17 Np Aerospace Ltd Method of making a helmet
ATE402802T1 (de) * 2005-02-04 2008-08-15 Egon Busch Verfahren zur herstellung eines ballistischen schutzpanzers
US7661228B1 (en) 2005-05-06 2010-02-16 Kontek Industries, Inc. Armored building modules and panels
US7622405B1 (en) * 2006-09-26 2009-11-24 Honeywell International Inc. High performance same fiber composite hybrids by varying resin content only
IL179126A (en) * 2006-11-08 2013-10-31 Plasan Sasa Ltd Armor board
US7964267B1 (en) 2007-04-13 2011-06-21 Bae Systems Tensylon H.P.M., Inc. Ballistic-resistant panel including high modulus ultra high molecular weight polyethylene tape
US8679613B2 (en) * 2007-05-21 2014-03-25 Ceradyne, Inc. Armor having a ballistic composite wrap slip layer and a laminate containment wrap
US8661572B2 (en) * 2007-09-06 2014-03-04 Artisent, Llc Helmet edge band
US8388787B2 (en) * 2009-07-17 2013-03-05 Gentex Corporation Method of making a composite sheet
US8997642B2 (en) 2011-08-08 2015-04-07 The Boeing Company Method for transporting, placing and compacting composite stiffeners
US9931807B2 (en) * 2011-08-08 2018-04-03 The Boeing Company Flexible compactor with reinforcing spine
AR082607A1 (es) * 2011-08-09 2012-12-19 Miguel Angel Fulcheri Un panel balistico y procedimiento para obtenerlo
USD738577S1 (en) 2013-01-14 2015-09-08 Jeremy L. Harrell Inflatable pad pattern
USD743633S1 (en) 2013-01-14 2015-11-17 Jeremy L. Harrell Inflatable pad pattern
USD731122S1 (en) 2013-01-14 2015-06-02 Jeremy L. Harrell Inflatable pad
USD738576S1 (en) 2013-01-14 2015-09-08 Jeremy L. Harrell Inflatable pad pattern
US9272767B2 (en) 2013-04-19 2016-03-01 The Boeing Company Compacting uncured composite members on contoured mandrel surfaces
MX2016008537A (es) 2013-12-31 2017-02-02 Ppg Ind Ohio Inc Sistema de montaje de blindaje y blindaje que incorpora el mismo.
US9803959B2 (en) * 2014-06-27 2017-10-31 Ppg Industries Ohio, Inc. Reduced weight armor systems and methods of manufacturing the same

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GB720687A (en) * 1953-02-10 1954-12-22 Helmets Ltd Improvements in the manufacture of helmets and like hollow articles
GB839453A (en) * 1955-05-09 1960-06-29 Gen Textile Mills Inc Improvements in or relating to protective helmets
US3722355A (en) * 1965-08-03 1973-03-27 Aerojet General Co Lightweight armor material
GB1151441A (en) * 1966-03-31 1969-05-07 Aerojet General Co Lightweight Armour Material
CA952806A (en) * 1970-06-23 1974-08-13 Monsanto Company Graphite fiber laminar composite
US3778334A (en) * 1971-04-20 1973-12-11 Du Pont High modulus organic fiber layers alternating with inorganic fiber layers in a resin matrix
US4048365A (en) * 1974-05-24 1977-09-13 Hoover William H Armor structure formed from plastic laminates
US3924038A (en) * 1974-06-12 1975-12-02 Us Air Force Fragment suppression configuration
US3958276A (en) * 1975-07-09 1976-05-25 Clausen Carol W Helmet
FR2340066A1 (fr) * 1976-02-09 1977-09-02 Sl France Casque de protection
GB1583430A (en) * 1977-05-12 1981-01-28 Saati Sas Bullet proof jacket
US4292882A (en) * 1977-06-07 1981-10-06 Clausen Carol W Armor comprising a plurality of loosely related sheets in association with a frontal sheet comprising metal abrading particles
IT1084874B (it) * 1977-09-12 1985-05-28 Bottini Emilio Materiale composito antiproiettile,formabile in lastre piane e curve o in corpi cavi di forma complessa
US4199388A (en) * 1978-05-15 1980-04-22 Geonautics, Inc. Method for making a multi-ply continuous filament ballistic helmet
EP0028476B1 (en) * 1979-10-31 1983-10-05 Michael Sacks Protective shields
FR2469277A1 (fr) * 1979-11-08 1981-05-22 Poudres & Explosifs Ste Nale Dispositif de protection contre les chocs et les explosions constitues de materiaux stratifies a base de fibres et de resine viscoelastique
FR2484074A1 (fr) * 1980-06-06 1981-12-11 Petit Claude Materiau de blindage et procede pour sa pose
GB2090725B (en) * 1981-01-06 1985-02-27 Lightweight Body Armour Ltd Body armour
GB2124887B (en) * 1982-06-19 1987-02-04 Personnel Armoured Designs Lim Protective shield
GB2130073B (en) * 1982-11-11 1986-03-05 Personnel Armoured Designs Lim Protective shield
FR2537502B1 (fr) * 1982-12-13 1985-07-19 Ind Plastique Mecanique Materiau composite comprenant une ossature formee d'une nappe tissee, impregnee de matiere plastique et pourvue d'au moins une couche de revetement exterieur

Also Published As

Publication number Publication date
FR2550621A1 (fr) 1985-02-15
GB8418777D0 (en) 1984-08-30
GB2144973B (en) 1987-03-25
SE462996B (sv) 1990-09-24
IL72129A (en) 1990-12-23
DE3425634A1 (de) 1985-02-21
GB2144973A (en) 1985-03-20
US4550044A (en) 1985-10-29
SE8404023L (sv) 1985-02-09
FR2550621B1 (fr) 1989-05-26

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