ES465953A1 - Perfeccionamientos en la realizacion de circuitos inductivosincorporados en un soporte - Google Patents
Perfeccionamientos en la realizacion de circuitos inductivosincorporados en un soporteInfo
- Publication number
- ES465953A1 ES465953A1 ES465953A ES465953A ES465953A1 ES 465953 A1 ES465953 A1 ES 465953A1 ES 465953 A ES465953 A ES 465953A ES 465953 A ES465953 A ES 465953A ES 465953 A1 ES465953 A1 ES 465953A1
- Authority
- ES
- Spain
- Prior art keywords
- support member
- circuit
- making
- inductive
- planar
- 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
Links
- 230000001939 inductive effect Effects 0.000 title abstract 2
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000000463 material Substances 0.000 abstract 2
- 239000004020 conductor Substances 0.000 abstract 1
- 238000007796 conventional method Methods 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 abstract 1
- 238000007747 plating Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/3564—Mechanical details of the actuation mechanism associated with the moving element or mounting mechanism details
- G02B6/3568—Mechanical details of the actuation mechanism associated with the moving element or mounting mechanism details characterised by the actuating force
- G02B6/3572—Magnetic force
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0033—Printed inductances with the coil helically wound around a magnetic core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/041—Printed circuit coils
- H01F41/046—Printed circuit coils structurally combined with ferromagnetic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/351—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements
- G02B6/353—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements the optical element being a shutter, baffle, beam dump or opaque element
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
- G02B6/3544—2D constellations, i.e. with switching elements and switched beams located in a plane
- G02B6/3548—1xN switch, i.e. one input and a selectable single output of N possible outputs
- G02B6/3552—1x1 switch, e.g. on/off switch
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/05—Insulated conductive substrates, e.g. insulated metal substrate
- H05K1/056—Insulated conductive substrates, e.g. insulated metal substrate the metal substrate being covered by an organic insulating layer
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/08—Magnetic details
- H05K2201/083—Magnetic materials
- H05K2201/086—Magnetic materials for inductive purposes, e.g. printed inductor with ferrite core
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09009—Substrate related
- H05K2201/09063—Holes or slots in insulating substrate not used for electrical connections
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09009—Substrate related
- H05K2201/09081—Tongue or tail integrated in planar structure, e.g. obtained by cutting from the planar structure
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
- H05K2201/097—Alternating conductors, e.g. alternating different shaped pads, twisted pairs; Alternating components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10053—Switch
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
- Y10T29/49146—Assembling to base an electrical component, e.g., capacitor, etc. with encapsulating, e.g., potting, etc.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Coils Or Transformers For Communication (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Electromagnets (AREA)
Abstract
Perfeccionamientos en la realización de circuitos inductivos incorporados en un soporte, en particular una tarjeta de circuitos impresos que soporta componentes electrónicos y mecánicos, y en donde el soporte comprende al menos localmente y en al menos una parte de su espesor un material magnético, caracterizados porque se practica en el soporte al menos dos ventanas que definen un circuito magnético, formando la zona del soporte situada entre las ventanas un núcleo magnético, y estando realizado el circuito inductivo por al menos una primera plastificación de todas las caras del núcleo según la cual se realiza un bobinado por depósito metálico según la técnica de los circuitos impresos.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7700852A FR2377743A1 (fr) | 1977-01-13 | 1977-01-13 | Procede de realisation de circuits inductifs |
FR7701249A FR2377649A1 (fr) | 1977-01-17 | 1977-01-17 | Commutateur optique |
FR7704189A FR2380568A1 (fr) | 1977-02-15 | 1977-02-15 | Commutateur optique |
Publications (1)
Publication Number | Publication Date |
---|---|
ES465953A1 true ES465953A1 (es) | 1979-01-01 |
Family
ID=27250708
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES465953A Expired ES465953A1 (es) | 1977-01-13 | 1978-01-13 | Perfeccionamientos en la realizacion de circuitos inductivosincorporados en un soporte |
Country Status (14)
Country | Link |
---|---|
US (1) | US4253231A (es) |
JP (1) | JPS5388950A (es) |
BE (1) | BE862654A (es) |
CA (1) | CA1106076A (es) |
DE (1) | DE2800918A1 (es) |
ES (1) | ES465953A1 (es) |
FI (1) | FI780056A (es) |
GB (1) | GB1549601A (es) |
IE (1) | IE45959B1 (es) |
IT (1) | IT1091878B (es) |
NL (1) | NL7800457A (es) |
OA (1) | OA05851A (es) |
PT (1) | PT67520B (es) |
SE (1) | SE7800357L (es) |
Families Citing this family (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3134351A1 (de) * | 1980-04-25 | 1983-03-31 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur herstellung einer hybridschaltung |
US4649497A (en) * | 1983-06-03 | 1987-03-10 | John Fluke Mfg. Co., Inc. | Computer-produced circuit board |
DE3322004A1 (de) * | 1983-06-18 | 1984-12-20 | Robert Bosch Gmbh, 7000 Stuttgart | Induktives element, insbesondere uebertrager |
JPS62201907U (es) * | 1986-06-13 | 1987-12-23 | ||
JPS62201911U (es) * | 1986-06-13 | 1987-12-23 | ||
FR2605784B1 (fr) * | 1986-10-28 | 1989-04-28 | Europ Composants Electron | Procede de realisation d'un support magnetique bobine plan pour tetes magnetiques de lecture et d'enregistrement et support obtenu par ce procede |
DE3708209C2 (de) * | 1987-03-13 | 1995-08-03 | Bosch Gmbh Robert | Hochfrequenz-Bauelement |
JPH0779050B2 (ja) * | 1987-07-16 | 1995-08-23 | 住友電気工業株式会社 | 小型超電導ソレノイドの製造方法 |
US4977668A (en) * | 1989-01-05 | 1990-12-18 | Mckenzie Technology, Inc. | Method of making socket connector |
CA2062710C (en) * | 1991-05-31 | 1996-05-14 | Nobuo Shiga | Transformer for monolithic microwave integrated circuit |
US5487214A (en) * | 1991-07-10 | 1996-01-30 | International Business Machines Corp. | Method of making a monolithic magnetic device with printed circuit interconnections |
US5161098A (en) * | 1991-09-09 | 1992-11-03 | Power Integrations, Inc. | High frequency switched mode converter |
US5392020A (en) * | 1992-12-14 | 1995-02-21 | Chang; Kern K. N. | Flexible transformer apparatus particularly adapted for high voltage operation |
TW265450B (en) * | 1994-06-30 | 1995-12-11 | At & T Corp | Devices using metallized magnetic substrates |
US5781091A (en) * | 1995-07-24 | 1998-07-14 | Autosplice Systems Inc. | Electronic inductive device and method for manufacturing |
US6005467A (en) * | 1997-02-11 | 1999-12-21 | Pulse Engineering, Inc. | Trimmable inductor |
WO1999063557A1 (fr) * | 1998-05-29 | 1999-12-09 | Nissha Printing Co., Ltd. | Bobine annulaire imprimee et procede de fabrication correspondant |
US6087921A (en) * | 1998-10-06 | 2000-07-11 | Pulse Engineering, Inc. | Placement insensitive monolithic inductor and method of manufacturing same |
AU2750401A (en) * | 1999-11-03 | 2001-05-30 | R. Jennifer Hwu | Vertical transformer |
US6531945B1 (en) * | 2000-03-10 | 2003-03-11 | Micron Technology, Inc. | Integrated circuit inductor with a magnetic core |
US6674355B2 (en) * | 2000-05-19 | 2004-01-06 | M-Flex Multi-Fineline Electronix, Inc. | Slot core transformers |
US6655002B1 (en) * | 2000-06-28 | 2003-12-02 | Texas Instruments Incorporated | Microactuator for use in mass data storage devices, or the like, and method for making same |
US6374481B1 (en) * | 2000-06-28 | 2002-04-23 | Texas Instruments Incorporated | Method for making microactuator for use in mass data storage devices |
CN1261753C (zh) * | 2000-09-22 | 2006-06-28 | M-福来克斯多精线电子学公司 | 电子变压器/电感器器件及其制造方法 |
US7135952B2 (en) * | 2002-09-16 | 2006-11-14 | Multi-Fineline Electronix, Inc. | Electronic transformer/inductor devices and methods for making same |
KR100495533B1 (ko) * | 2003-07-18 | 2005-06-16 | 엘지전자 주식회사 | 가변 광 감쇠기 및 그의 어레이 |
US6966800B2 (en) * | 2004-03-22 | 2005-11-22 | Fci Americas Technology, Inc. | Overmolded electrical connector |
US7306008B2 (en) * | 2004-04-05 | 2007-12-11 | Tornay Paul G | Water leak detection and prevention systems and methods |
MX2007006737A (es) * | 2004-12-07 | 2007-11-23 | Flex Multi Fineline Electronix | Microcircuiteria y componentes inductivos y metodos para fabricar los mismos. |
US7436282B2 (en) * | 2004-12-07 | 2008-10-14 | Multi-Fineline Electronix, Inc. | Miniature circuitry and inductive components and methods for manufacturing same |
US7645941B2 (en) | 2006-05-02 | 2010-01-12 | Multi-Fineline Electronix, Inc. | Shielded flexible circuits and methods for manufacturing same |
EP2095379A4 (en) * | 2006-11-14 | 2012-12-19 | Pulse Eng Inc | WIRELESS INDUCTIVE DEVICE AND METHOD |
US7982572B2 (en) * | 2008-07-17 | 2011-07-19 | Pulse Engineering, Inc. | Substrate inductive devices and methods |
US9664711B2 (en) | 2009-07-31 | 2017-05-30 | Pulse Electronics, Inc. | Current sensing devices and methods |
US9823274B2 (en) | 2009-07-31 | 2017-11-21 | Pulse Electronics, Inc. | Current sensing inductive devices |
US8591262B2 (en) | 2010-09-03 | 2013-11-26 | Pulse Electronics, Inc. | Substrate inductive devices and methods |
CN104160552B (zh) | 2012-03-02 | 2017-05-24 | 派斯电子公司 | 沉积天线设备及方法 |
US9304149B2 (en) | 2012-05-31 | 2016-04-05 | Pulse Electronics, Inc. | Current sensing devices and methods |
US20140125446A1 (en) | 2012-11-07 | 2014-05-08 | Pulse Electronics, Inc. | Substrate inductive device methods and apparatus |
US10020561B2 (en) | 2013-09-19 | 2018-07-10 | Pulse Finland Oy | Deposited three-dimensional antenna apparatus and methods |
WO2015125028A2 (en) | 2014-02-12 | 2015-08-27 | Pulse Finland Oy | Methods and apparatus for conductive element deposition and formation |
US9833802B2 (en) | 2014-06-27 | 2017-12-05 | Pulse Finland Oy | Methods and apparatus for conductive element deposition and formation |
MX2017011353A (es) * | 2015-03-05 | 2018-06-06 | Enhanced Life Water Solutions Llc | Sistemas y metodos para controlar campos electricos en un fluido, gases y bacterias. |
EP4311378A3 (en) * | 2018-11-02 | 2024-03-27 | Delta Electronics (Shanghai) Co., Ltd. | Transformer module and power module |
US11133750B2 (en) | 2018-11-02 | 2021-09-28 | Delta Electronics (Shanghai) Co., Ltd. | Power module |
CN111145988B (zh) * | 2018-11-02 | 2021-12-07 | 台达电子企业管理(上海)有限公司 | 变压器模块及功率模块 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3185947A (en) * | 1959-11-16 | 1965-05-25 | Arf Products | Inductive module for electronic devices |
US3372358A (en) * | 1966-04-12 | 1968-03-05 | Itt | Film transformers |
US3564708A (en) * | 1968-04-15 | 1971-02-23 | Technitrol Inc | Method of making a plated core electrical component |
US3992691A (en) * | 1975-07-02 | 1976-11-16 | Cubic Corporation | Electronic circuit board flat coil inductor |
-
1978
- 1978-01-05 BE BE1008628A patent/BE862654A/xx unknown
- 1978-01-06 GB GB455/78A patent/GB1549601A/en not_active Expired
- 1978-01-09 FI FI780056A patent/FI780056A/fi not_active Application Discontinuation
- 1978-01-10 DE DE19782800918 patent/DE2800918A1/de not_active Withdrawn
- 1978-01-11 US US05/868,581 patent/US4253231A/en not_active Expired - Lifetime
- 1978-01-12 PT PT67520A patent/PT67520B/pt unknown
- 1978-01-12 SE SE7800357A patent/SE7800357L/xx unknown
- 1978-01-12 CA CA294,816A patent/CA1106076A/fr not_active Expired
- 1978-01-12 IE IE62/78A patent/IE45959B1/en unknown
- 1978-01-12 IT IT19210/78A patent/IT1091878B/it active
- 1978-01-13 JP JP209278A patent/JPS5388950A/ja active Pending
- 1978-01-13 ES ES465953A patent/ES465953A1/es not_active Expired
- 1978-01-13 NL NL7800457A patent/NL7800457A/xx not_active Application Discontinuation
- 1978-01-13 OA OA56369A patent/OA05851A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
CA1106076A (fr) | 1981-07-28 |
IT1091878B (it) | 1985-07-06 |
BE862654A (fr) | 1978-07-05 |
NL7800457A (nl) | 1978-07-17 |
SE7800357L (sv) | 1978-07-14 |
DE2800918A1 (de) | 1978-07-27 |
JPS5388950A (en) | 1978-08-04 |
PT67520B (fr) | 1979-06-12 |
IE45959B1 (en) | 1983-01-12 |
PT67520A (fr) | 1978-02-01 |
IT7819210A0 (it) | 1978-01-12 |
OA05851A (fr) | 1981-05-31 |
US4253231A (en) | 1981-03-03 |
GB1549601A (en) | 1979-08-08 |
IE780062L (en) | 1978-07-13 |
FI780056A (fi) | 1978-07-14 |
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