BE719533A - - Google Patents

Info

Publication number
BE719533A
BE719533A BE719533DA BE719533A BE 719533 A BE719533 A BE 719533A BE 719533D A BE719533D A BE 719533DA BE 719533 A BE719533 A BE 719533A
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.)
Filing date
Publication date
Application filed filed Critical
Publication of BE719533A publication Critical patent/BE719533A/xx

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
    • E04B2/76—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal
    • E04B2/766—T-connections
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B96/00—Details of cabinets, racks or shelf units not covered by a single one of groups A47B43/00 - A47B95/00; General details of furniture
    • A47B96/14—Bars, uprights, struts, or like supports, for cabinets, brackets, or the like
    • A47B96/145—Composite members, i.e. made up of several elements joined together
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B96/00—Details of cabinets, racks or shelf units not covered by a single one of groups A47B43/00 - A47B95/00; General details of furniture
    • A47B96/14—Bars, uprights, struts, or like supports, for cabinets, brackets, or the like
    • A47B96/1466—Bars, uprights, struts, or like supports, for cabinets, brackets, or the like with longitudinal grooves
    • A47B96/1483—Bars, uprights, struts, or like supports, for cabinets, brackets, or the like with longitudinal grooves and radial arms
    • 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
    • E04B1/38—Connections for building structures in general
    • E04B1/58—Connections for building structures in general of bar-shaped building elements
    • 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
    • E04B1/38—Connections for building structures in general
    • E04B1/58—Connections for building structures in general of bar-shaped building elements
    • E04B1/5806—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile
    • E04B1/5818—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile of substantially U - form
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
    • E04B2/58—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of metal
    • E04B2/60—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of metal characterised by special cross-section of the elongated members
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/96—Corner joints or edge joints for windows, doors, or the like frames or wings
    • E06B3/964—Corner joints or edge joints for windows, doors, or the like frames or wings using separate connection pieces, e.g. T-connection pieces
    • E06B3/968—Corner joints or edge joints for windows, doors, or the like frames or wings using separate connection pieces, e.g. T-connection pieces characterised by the way the connecting pieces are fixed in or on the frame members
    • E06B3/98—Corner joints or edge joints for windows, doors, or the like frames or wings using separate connection pieces, e.g. T-connection pieces characterised by the way the connecting pieces are fixed in or on the frame members the connecting pieces being specially adapted for drawing the frame members towards each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B12/00—Jointing of furniture or the like, e.g. hidden from exterior
    • F16B12/10—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like
    • F16B12/12—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics
    • F16B12/20—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using clamps, clips, wedges, sliding bolts, or the like
    • F16B12/2009—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using clamps, clips, wedges, sliding bolts, or the like actuated by rotary motion
    • F16B12/2054—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using clamps, clips, wedges, sliding bolts, or the like actuated by rotary motion with engaging screw threads as securing means for limiting movement
    • F16B12/2063—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using clamps, clips, wedges, sliding bolts, or the like actuated by rotary motion with engaging screw threads as securing means for limiting movement with engaging screw threads as tightening means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B12/00—Jointing of furniture or the like, e.g. hidden from exterior
    • F16B12/40—Joints for furniture tubing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/04—Clamping or clipping connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/04—Clamping or clipping connections
    • F16B7/044—Clamping or clipping connections for rods or tubes being in angled relationship
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/04—Clamping or clipping connections
    • F16B7/044—Clamping or clipping connections for rods or tubes being in angled relationship
    • F16B7/0446—Clamping or clipping connections for rods or tubes being in angled relationship for tubes using the innerside thereof
    • F16B7/0453—Clamping or clipping connections for rods or tubes being in angled relationship for tubes using the innerside thereof the tubes being drawn towards each other
    • F16B7/0466—Clamping or clipping connections for rods or tubes being in angled relationship for tubes using the innerside thereof the tubes being drawn towards each other by a screw-threaded stud with a conical tip acting on an inclined surface
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B2230/00—Furniture jointing; Furniture with such jointing
    • A47B2230/0003—Adjustable furniture jointing
    • A47B2230/0018—Screws or bolts sliding in sectional grooves
    • A47B2230/0022—Screws or bolts sliding in sectional grooves with tightening devices
    • 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
    • E04B1/38—Connections for building structures in general
    • E04B1/58—Connections for building structures in general of bar-shaped building elements
    • E04B2001/5868—Hinged connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/40—Clamping arrangements where clamping parts are received in recesses of elements to be connected
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/46—Rod end to transverse side of member

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
BE719533D 1968-03-28 1968-08-16 BE719533A (el)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH521868A CH495511A (de) 1968-03-28 1968-03-28 Bausatz
CH946468 1968-06-19

Publications (1)

Publication Number Publication Date
BE719533A true BE719533A (el) 1969-02-17

Family

ID=25697225

Family Applications (2)

Application Number Title Priority Date Filing Date
BE719533D BE719533A (el) 1968-03-28 1968-08-16
BE734793D BE734793A (el) 1968-03-28 1969-06-19

Family Applications After (1)

Application Number Title Priority Date Filing Date
BE734793D BE734793A (el) 1968-03-28 1969-06-19

Country Status (5)

Country Link
US (1) US3612585A (el)
BE (2) BE719533A (el)
CH (1) CH495511A (el)
DE (2) DE1784527B2 (el)
GB (1) GB1244335A (el)

Families Citing this family (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3778175A (en) * 1971-06-04 1973-12-11 E Zimmer Snap locking structural joint assembly
DE2356225B2 (de) * 1972-11-14 1978-08-03 Saceaco Di Rivosecchi Mario & C. S.A.S., Mailand (Italien) Elementensatz zur Bildung von Traggerüsten für Büroeinrichtungen mit einem Vertikalstab
US3885765A (en) * 1973-04-17 1975-05-27 Adrian John Richards Furniture frames
FR2312614A1 (fr) * 1975-05-26 1976-12-24 Scherrer Fernand Systeme d'assemblage pour charpentes
GB1566482A (en) * 1976-06-09 1980-04-30 Worrallo A C Frame jointing assembly and the like
CH633621A5 (en) * 1978-07-26 1982-12-15 Welco Technik Ag Structural element set for connecting in each case two profiles which abut against one another at any angle
EP0092668B1 (de) * 1982-04-22 1986-08-27 Valentin Küttenbaum Vorrichtung zum lösbaren Verbinden eines Gestellelements mit einem Gestellbauteil
GB2126309B (en) * 1982-09-03 1986-02-19 Nimlok Ltd Screen assembly and clip therefor
ATE63592T1 (de) * 1982-09-07 1991-06-15 Phoenix Interiors Ltd System fuer eine demontierbare trennwand.
FR2545164B1 (fr) * 1983-04-28 1986-10-10 Renaud Goud Louis Dispositif d'assemblage d'elements de construction, notamment d'elements de construction en bois
US4642946A (en) * 1985-10-02 1987-02-17 Adex, Inc. Modular display system
FR2618246B1 (fr) * 1987-07-16 1989-11-24 Avenir Publicite Sa Support de panneaux notamment de panneaux d'affichage.
DE3726503A1 (de) * 1987-08-08 1989-02-23 Schoenfeld Hans Victor Bauelement
DE8803222U1 (de) * 1988-03-10 1989-07-06 Vereinigte Aluminium-Werke AG, 1000 Berlin und 5300 Bonn Gerippe, insbesondere für Kofferaufbauten von LKW's
CH682252A5 (en) * 1990-10-30 1993-08-13 Alusuisse Lonza Services Ag Corner connection of two profiles with C=profile attachments - has attachments with two arms at free ends of which are counterpoised fillets with one profile having longitudinal grooves on its outer and inner sides
DE4221387C2 (de) * 1992-06-30 1996-02-29 Mero Raumstruktur Gmbh & Co Gitterträger, insbesondere für Raumfachwerke
FR2708302B1 (fr) * 1993-06-28 1995-10-20 Eck Bernard Structure de montage rapide à base de profilés préférentiellement en aluminium.
DE4397555T1 (de) * 1993-09-02 1997-07-31 Smc Kk Konstruktionskörper für Betätigungselemente
US5520292A (en) * 1994-05-16 1996-05-28 Lombardi; Donald G. Percussion instrument mounting apparatus
DE19520892A1 (de) * 1995-06-08 1996-12-12 Heron Sondermaschinen Und Steu Plattenverbinder
DE19522044A1 (de) * 1995-06-17 1996-12-19 Schueco Int Kg Eck- oder T-Verbindung an Rahmen oder Gestellen
US5797695A (en) * 1995-09-01 1998-08-25 Prusmack; A. Jon Articulating hub asssembly
DE19604665A1 (de) * 1996-02-09 1997-08-14 Robert Soenser Querverbinder für Profilstäbe
DE19623870C1 (de) * 1996-06-14 1997-10-02 Boyko Strey Gmbh & Co Kg Vorrichtung zum lösbaren Verbinden von Profilstäben
DE19641500C2 (de) * 1996-10-09 2001-10-25 Siegfried Aichner Vorrichtung zum lösbaren Verbinden von Profilstäben
DE19757086A1 (de) * 1997-12-20 1999-04-22 Bosch Gmbh Robert Verbindungselement zum Verbinden von Profilstäben
DE19757087C2 (de) * 1997-12-20 1999-12-09 Bosch Gmbh Robert Verbindungselement zum Verbinden von Profilstäben
DE29803579U1 (de) * 1998-03-02 1999-07-15 Robert Bosch Gmbh, 70469 Stuttgart Vorrichtung zum Befestigen von Bauelementen
DE19842896C2 (de) * 1998-09-18 2001-11-29 Fms Foerder Und Montage System Verbindungseinrichtung zum Verbinden von Profilstäben
DE10006316C2 (de) * 2000-02-12 2001-12-06 Hermann Moll Konstruktionsprofil
ES2233120B1 (es) * 2001-08-01 2006-10-01 Rafael Sotillo Crespo Sistema de perfiles con estructura abierta adecuados para mobiliario.
DE20112823U1 (de) 2001-08-01 2001-10-18 Krannich, Sabine, 71263 Weil der Stadt Befestigungsvorrichtung
SE527094C2 (sv) * 2005-02-18 2005-12-20 Hl Display Ab Kopplingsanordning för profilelement
DE202005013097U1 (de) * 2005-08-17 2005-12-22 Stauss, Ulrich Kippverbinder
DE102007002637A1 (de) * 2007-01-12 2008-07-17 Raumplus Gmbh & Co. Kg Regalsystem
US8585000B2 (en) 2008-05-22 2013-11-19 Mainstream Energy Corporation Universal end clamp
US8657129B2 (en) * 2010-12-07 2014-02-25 Avedis Zildjian Co. Drum rack
US20120193311A1 (en) * 2011-02-01 2012-08-02 Visual Graphic Systems, Inc. Aisle violating display for adorning retail shelving systems
US8453402B2 (en) * 2011-04-29 2013-06-04 Rong-Jun Huang Frame unit of a curtain wall
US9555542B2 (en) 2014-12-23 2017-01-31 Gary Gordon Klein High efficiency structural building system for robotics
US20170030391A1 (en) * 2015-07-31 2017-02-02 Iconify Corp. T-Slot Mechanism and Assembly for Use in Furniture Constructions
USD818014S1 (en) 2015-12-22 2018-05-15 Gary Gordon Klein Extruded structural building component for robotics
USD809029S1 (en) 2015-12-22 2018-01-30 Gary Gordon Klein Extruded structural building component for robotics
US11141765B2 (en) * 2016-10-07 2021-10-12 Robotzone, Llc Extruded bar stock
US20190119945A1 (en) * 2017-10-24 2019-04-25 Celina Tent, Inc. Connection fittings for a transportable shelter
US10662650B2 (en) * 2017-10-31 2020-05-26 Vention Inc. T-slot extrusion structure
CN109958685A (zh) * 2017-12-22 2019-07-02 上海红快展示科技有限公司 一种幕布框架组件
ES2802699A1 (es) * 2019-07-09 2021-01-20 Ar Sist S A Dispositivo de unión de puntales de estanterías metálicas modulares
CN112096224B (zh) * 2020-09-17 2022-05-17 佛山市理想卫浴有限公司 淋浴门及其门框组件

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Publication number Priority date Publication date Assignee Title
US1608592A (en) * 1926-02-24 1926-11-30 Herbert C Funk Toy construction unit
US2696139A (en) * 1952-05-28 1954-12-07 Charles W Attwood Nut for locking engagement with unistrut
US3021576A (en) * 1955-11-18 1962-02-20 Alsynite Company Of America Frame structure
US3061055A (en) * 1956-12-01 1962-10-30 Alkono Ag Connection of profilated posts and profilated posts suited for this connection
US3043408A (en) * 1959-03-23 1962-07-10 Warren R Attwood Metallic framing element
US3100556A (en) * 1959-07-30 1963-08-13 Reynolds Metals Co Interlocking metallic structural members
CH362194A (fr) * 1960-04-07 1962-05-31 Fils Jacques Huguenin Dispositif comprenant des barres profilées pour la construction d'armatures métalliques destinées au domaine mobilier et immobilier
US3087768A (en) * 1960-05-18 1963-04-30 Amco Eng Enclosure
US3261625A (en) * 1961-12-27 1966-07-19 Reynolds Metals Co Joint between vertical and horizontal members in a partition construction
US3265416A (en) * 1962-06-08 1966-08-09 Leonard O Downes Structural framing system
US3178775A (en) * 1962-11-14 1965-04-20 Tassell Hardware Company Demountable wall and mounting fixture therefor
US3186561A (en) * 1963-12-04 1965-06-01 Strassle Marcel Profiled bar
US3371454A (en) * 1965-10-24 1968-03-05 Anderson Mfg Co V E Partition structure

Also Published As

Publication number Publication date
DE1784527A1 (de) 1971-08-12
CH495511A (de) 1970-08-31
DE1784527B2 (de) 1977-06-23
BE734793A (el) 1969-12-01
DE1931103A1 (de) 1970-09-17
US3612585A (en) 1971-10-12
GB1244335A (en) 1971-08-25

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