FI793493A - Ljudisolerande byggnadselement - Google Patents

Ljudisolerande byggnadselement

Info

Publication number
FI793493A
FI793493A FI793493A FI793493A FI793493A FI 793493 A FI793493 A FI 793493A FI 793493 A FI793493 A FI 793493A FI 793493 A FI793493 A FI 793493A FI 793493 A FI793493 A FI 793493A
Authority
FI
Finland
Prior art keywords
ljudisolerande
byggnadselement
ljudisolerande byggnadselement
Prior art date
Application number
FI793493A
Other languages
English (en)
Other versions
FI64968B (fi
FI64968C (fi
Inventor
Jan Soederquist
Stefan Einarsson
Original Assignee
Ingemanssons Ingenjorsbyra Ab
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 Ingemanssons Ingenjorsbyra Ab filed Critical Ingemanssons Ingenjorsbyra Ab
Publication of FI793493A publication Critical patent/FI793493A/fi
Publication of FI64968B publication Critical patent/FI64968B/fi
Application granted granted Critical
Publication of FI64968C publication Critical patent/FI64968C/fi

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
    • E04F15/20—Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
    • E04F15/206—Layered panels for sound insulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B19/00—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica
    • B32B19/04—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/86—Sound-absorbing elements slab-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/026—Porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00—Walls, panels
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B2001/742—Use of special materials; Materials having special structures or shape
    • E04B2001/748—Honeycomb materials
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y10T428/24124—Fibers
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24149—Honeycomb-like
    • Y10T428/24165—Hexagonally shaped cavities

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Acoustics & Sound (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Electromagnetism (AREA)
  • Building Environments (AREA)
FI793493A 1978-11-17 1979-11-07 Ljudisolerande skiktelement FI64968C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7811891A SE420750B (sv) 1978-11-17 1978-11-17 Ljudisolerande byggnadselement med stor styvhet
SE7811891 1978-11-17

Publications (3)

Publication Number Publication Date
FI793493A true FI793493A (fi) 1980-05-18
FI64968B FI64968B (fi) 1983-10-31
FI64968C FI64968C (fi) 1984-02-10

Family

ID=20336392

Family Applications (1)

Application Number Title Priority Date Filing Date
FI793493A FI64968C (fi) 1978-11-17 1979-11-07 Ljudisolerande skiktelement

Country Status (12)

Country Link
US (1) US4317503A (fi)
JP (1) JPS5947785B2 (fi)
CA (1) CA1137417A (fi)
DE (1) DE2946392C2 (fi)
DK (1) DK480079A (fi)
FI (1) FI64968C (fi)
FR (1) FR2441692A1 (fi)
GB (1) GB2035897B (fi)
NL (1) NL7908145A (fi)
NO (1) NO793716L (fi)
PL (1) PL130193B1 (fi)
SE (1) SE420750B (fi)

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4301890A (en) * 1979-12-06 1981-11-24 Lord Corporation Sound-absorbing panel
DE8213227U1 (de) * 1982-05-07 1982-08-19 Rheinhold & Mahla Gmbh, 6800 Mannheim Schallmindernde waermedaemmung
DE3367817D1 (en) * 1982-09-25 1987-01-08 Audi Ag Silencer lining
US4487793A (en) * 1982-12-27 1984-12-11 Armstrong World Industries, Inc. Vinyl covered sound absorbing structure
DE3504208A1 (de) * 1985-02-07 1986-08-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Schalldaempfer-box
US4611444A (en) * 1985-02-28 1986-09-16 Simplex Ceiling Corp. Sanitary acoustical ceiling
US4899498A (en) * 1988-10-03 1990-02-13 Grieb Donald L Foam cement highway sound barrier
CH678306A5 (fi) * 1989-12-29 1991-08-30 Matec Holding
GB9323829D0 (en) * 1993-11-19 1994-01-05 Dow Deutschland Inc Acoustic insulating panels or elements
US6007890A (en) * 1993-11-19 1999-12-28 The Dow Chemical Company Acoustic insulating panels or elements
CH686423A5 (de) * 1993-11-25 1996-03-29 Alusuisse Lonza Services Ag Formsteife Verbundplatte.
NL9400173A (nl) * 1994-02-04 1995-09-01 Veldhoen Raalte B V Geluidsscherm.
DE19653850C2 (de) * 1996-12-21 1999-01-28 Daimler Benz Aerospace Airbus Wandelement
DE19804718C2 (de) 1998-02-06 2001-09-13 Eurocopter Deutschland Schall absorbierende Sandwichwand
EP0965701A1 (en) 1998-06-19 1999-12-22 Dow Deutschland Inc. Sound insulating panel
DE19839973A1 (de) * 1998-09-02 2000-03-23 Fraunhofer Ges Forschung Plattenförmiges Bauelement
US6755003B1 (en) * 1998-12-11 2004-06-29 Owens Corning Fiberglas Technology, Inc. Resilient construction member
US6615559B2 (en) 1998-12-11 2003-09-09 Owens Corning Fiberglas Technology, Inc. Resilient construction member, especially a unitary construction member
US6789645B1 (en) 1999-06-09 2004-09-14 The Dow Chemical Company Sound-insulating sandwich element
DE69936046T2 (de) 1999-06-09 2008-01-10 Dow Deutschland Inc. Sandwich-Schallisolierungselement
DE10155867B4 (de) * 2001-11-14 2006-11-02 Daimlerchrysler Ag Pralldämpfer
DE20118909U1 (de) * 2001-11-20 2003-03-27 Saint-Gobain Isover G+H AG, 68526 Ladenburg Trennwandelement für Raumteiler u.dgl. mit einer Füllung mit Wärmedämmstoff, insbesondere Mineralwolle
DE10231791C1 (de) * 2002-07-15 2003-12-18 Airbus Gmbh Mehrschichtplatte zur Verringerung der Schallabstrahlung
FR2850410B1 (fr) * 2003-01-24 2006-02-03 Hutchinson Panneau d'isolation acoustique
JP4050632B2 (ja) * 2003-02-24 2008-02-20 株式会社神戸製鋼所 吸音構造体
US7267196B2 (en) * 2004-02-12 2007-09-11 The Boeing Company Method and apparatus for reducing acoustic noise
US7419031B2 (en) * 2005-11-04 2008-09-02 The Boeing Company Integrally damped composite aircraft floor panels
US7837147B2 (en) * 2005-03-18 2010-11-23 The Boeing Company Systems and methods for reducing noise in aircraft fuselages and other structures
DE102005045844B3 (de) * 2005-09-26 2007-02-01 Airbus Deutschland Gmbh Schalldämmelement und Verfahren zur Herstellung eines Schalldämmelements
US20070193175A1 (en) * 2006-02-21 2007-08-23 Ta-Chung Hao Structure of decoration acoustic board
US9511571B2 (en) * 2007-01-23 2016-12-06 The Boeing Company Composite laminate having a damping interlayer and method of making the same
KR100793074B1 (ko) * 2007-09-06 2008-01-10 김부열 공기 정화 및 살균 기능을 갖는 건축물용 층간 소음 저감패널
DE102008063923A1 (de) * 2008-12-19 2010-06-24 Airbus Deutschland Gmbh Mehrschichtplatte zur Schalldämmung
US8425710B2 (en) * 2009-03-13 2013-04-23 The Boeing Company Automated placement of vibration damping materials
JP2012013912A (ja) * 2010-06-30 2012-01-19 Three M Innovative Properties Co 吸音システム及びその作製方法
US8739927B2 (en) * 2010-10-07 2014-06-03 Lg Hausys, Ltd. Gypsum panel having outstanding sound-absorbing properties and a production method therefor
US8770340B2 (en) * 2011-11-16 2014-07-08 Huntair, Inc. Sound-absorptive panel for an air handling system
US8640427B2 (en) * 2012-03-30 2014-02-04 Door Components, Inc. Sound insulating door
US8573357B1 (en) 2012-12-07 2013-11-05 Eggers Industries, Inc. Acoustical door
US9493949B2 (en) * 2014-03-20 2016-11-15 Vanair Design Panel and panel structure for ventilation and both reactive and dissipative sound dampening
DE202015004064U1 (de) 2015-06-10 2015-09-18 Akustikbüro Krämer + Stegmaier GmbH Vorrichtung zur Reduzierung von Schalldruckpegeln
CA3008499C (en) * 2016-10-31 2021-04-13 Yue Zhang Metal plate having hollow tubes sandwiched therein and its use
US11598087B2 (en) * 2017-06-03 2023-03-07 Gold Bond Building Products, Llc Sound damping wallboard and method of constructing a sound damping wallboard
CA2982731C (en) * 2017-10-17 2018-07-17 9236-3135 Qc Inc. Vibration absorption device and method for acoustic insulation
WO2020102082A1 (en) 2018-11-15 2020-05-22 Cummins Power Generation Ip, Inc. Genset enclosures with low acoustic noise

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE714399C (de) * 1935-12-17 1941-11-28 Dr Georg Hofbauer Schall- und waermedaemmende Verbindung von im Abstand voneinander angeordneten Bauteilen
BE482176A (fi) * 1943-12-09
BE634145A (fi) * 1962-07-06
GB1300409A (en) * 1969-08-18 1972-12-20 Secr Defence Improvements in hollow wall structures
DE2012522C3 (de) * 1970-03-17 1974-03-07 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V., 8000 Muenchen Dämmstreifen aus Hartschaumplatten zum Befestigen von Verkleidungsplatten an Trennwänden
FR2088967A6 (en) * 1970-04-30 1972-01-07 Alsace Laminoirs Composite sound insulation - designed to specific resonance and stiffness requirements using synthetic wool fibreboard and lead
DE2408028B2 (de) * 1974-02-20 1978-05-11 Fa. Carl Freudenberg, 6940 Weinheim Schallschluckplatte
US4084366A (en) * 1975-11-14 1978-04-18 Haworth Mfg., Inc. Sound absorbing panel
SE402142B (sv) * 1976-06-03 1978-06-19 Becker Wilhelm Ab Laminerad ljudabsorbent
US4155211A (en) * 1977-12-23 1979-05-22 Haworth Mfg., Inc. Sound absorbing panel

Also Published As

Publication number Publication date
CA1137417A (en) 1982-12-14
SE7811891L (sv) 1980-05-18
DE2946392A1 (de) 1980-06-04
NL7908145A (nl) 1980-05-20
US4317503A (en) 1982-03-02
PL130193B1 (en) 1984-07-31
DK480079A (da) 1980-05-18
NO793716L (no) 1980-05-20
JPS5572547A (en) 1980-05-31
SE420750B (sv) 1981-10-26
FI64968B (fi) 1983-10-31
FR2441692B1 (fi) 1984-10-19
GB2035897A (en) 1980-06-25
GB2035897B (en) 1982-09-29
FR2441692A1 (fr) 1980-06-13
JPS5947785B2 (ja) 1984-11-21
DE2946392C2 (de) 1987-03-05
FI64968C (fi) 1984-02-10
PL219667A1 (fi) 1980-07-14

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Legal Events

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MM Patent lapsed

Owner name: INGEMANSSONS INGENJOERSBYRA AB