EP1071861B1 - A braking device and a window screening arrangement comprising such a braking device - Google Patents

A braking device and a window screening arrangement comprising such a braking device Download PDF

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Publication number
EP1071861B1
EP1071861B1 EP99911652A EP99911652A EP1071861B1 EP 1071861 B1 EP1071861 B1 EP 1071861B1 EP 99911652 A EP99911652 A EP 99911652A EP 99911652 A EP99911652 A EP 99911652A EP 1071861 B1 EP1071861 B1 EP 1071861B1
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EP
European Patent Office
Prior art keywords
screening arrangement
cord
arrangement according
braking
window screening
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 - Lifetime
Application number
EP99911652A
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German (de)
French (fr)
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EP1071861A1 (en
Inventor
Ove Kold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VKR Holding AS
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VKR Holding AS
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Publication date
Application filed by VKR Holding AS filed Critical VKR Holding AS
Publication of EP1071861A1 publication Critical patent/EP1071861A1/en
Application granted granted Critical
Publication of EP1071861B1 publication Critical patent/EP1071861B1/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/88—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for limiting unrolling

Definitions

  • the present invention relates to a window screening arrangement, said screening arrangement being intended for mounting in a window aperture defined between a top member, a bottom member and two side members, and comprising a body of screening material which in an unscreening position is rolled up, collapsed or pleated at the top member and which in a free end is connected with at least one hollow bar extending substantially in parallel with the top and bottom members between the side members substantially throughout the width of the window aperture, and a parallel guidance system comprising two cords in reverse mounting, each cord being passed from a first fixture means at the top member along one side member, through the hollow bar and along the other side member to a second fixture means at the bottom member, a cord tightening means being provided in connection with at least one fixture means, in which the braking device comprises at least one braking member for retaining the hollow bar in at least one screening position.
  • an arresting device may eg. consist of side rails positioned at the window aperture side members and comprising a number of downwards facing recesses for engagement with the bar or pins connected therewith.
  • FR patent application No. 2 615 240 and US patent No. 785,806 represent one category of braking devices, in which the braking force of the braking device is adjusted by tightening the cords of the parallel guidance system.
  • operation of the screening arrangement may be difficult, as the braking force has to be surmounted in order to move the screening arrangement between the top and bottom members of the window aperture. This is particularly the case in roller blinds comprising a roller bar, the spring-bias of which the braking force has to counteract.
  • US patent No. 612,606 represents another category in which friction shoes at each end of the bottom bar cooperate with the side members of the aperture in order to retain the bar in the desired position. As the friction shoes are biassed by springs placed in the bar, the latter have to be deactivated in order to move the screening arrangement. Although operational comfort is provided once the friction shoes have been retracted from their frictional engagement with the side members, this arrangement is complicated and thus costly and cumbersome to produce and mount.
  • EP patent No. 0 725 885 discloses a roller blind comprising a braking device of the initially stated kind which alleviates many of the disadvantages of the prior art arrangements.
  • the braking device of this document comprises a friction member mounted in the bottom bar, in which at least one reversing member provides for at total change of the direction of the corresponding cord.
  • a window screening arrangement is characterized in that said at least one braking member of the braking device is mounted substantially stationarily on at least one of said cords and is intended, in a screening position, to engage with said hollow bar.
  • the braking device and consequently the entire window screening arrangement is simpler and cheaper to manufacture and mount.
  • the braking device may be provided separately, possibly together with the parallel guidance system. It is thus easy to substitute parts of the screening arrangement and it is possible to mount eg. the braking device subsequently on existing screening arrangements not being provided with such a device. Eventually, an indication of the desired screening position is obtained at the moment of engagement between the braking member or members and the bar, which may be advantageous in order to attract the user's attention eg. when the screening arrangement has reached its bottom position to prevent further downwards movement of the screening arrangement.
  • each braking member is designed as a symmetrical body, the axis of symmetry of which is substantially parallel with the corresponding cord.
  • the braking member or members may be designed as hollow body for accommodation of the cord.
  • the braking device comprises at least one pair of braking members placed opposite each other at substantially the same distance from the top member of the window aperture.
  • the window screening arrangement is designed as a roller blind having a body of screening material in the form of a web 2.
  • the web 2 is in one end fastened to and, in the position shown, partially rolled up on a roller bar 1 placed at a top member 10a which together with a bottom member 10b and two side members 10c,10d defines a window aperture 10.
  • the web 2 is connected with a bottom bar 3 which extends substantially in parallel with the top and bottom members 10a and 10b between the side members 10c,10d substantially throughout the width of the window aperture 10.
  • the parallelism of the bottom bar 3 is secured by a parallel guidance system which comprises a pair of cords 4,5 mounted in reverse of each other as will be explained in the following.
  • the cords 4,5 are in one end fastened to a respective one of a first fixture means 7 and 6 situated at the top member 10a near or at the side members 10c and 10d, respectively. From the fixture means 7,6 the cords 4,5 are passed along a respective one of the side members 10c,10d and through the bottom bar 3, which is formed with a through-going hollowness. During the passage through the bottom bar 3, the cords 4,5 cross each other such that they on the other side are passed downwards along the opposite side members 10d,10c to a second fixture means 8 and 9, respectively.
  • Cord tightening means 14,13 are provided in connection with the first fixture means 7,6. In the embodiment shown each cord tightening means 14,13 comprises a spring connected with each of the fixture means 7,6 but may instead be provided as an elastic cord.
  • the screening arrangement In order to operate the screening arrangement from the initial position, ie. when the web 2 is completely rolled up on the roller bar 1, a pull is exerted on the bar 3 which moves downwards and is as described in the above kept in parallel with the top and bottom members 10a,10b. In a position, in which the window aperture is at least partially screened, the screening arrangement is arrested or parked in the desired position by means of a braking device as will be explained in the following.
  • the braking device comprises two braking members 11,12 mounted on the cords 4 and 5, respectively, opposite each other and substantially at the same distance from the top member 10a of the window aperture.
  • the braking member 12 is designed as a hollow cylindrical body mounted substantially stationarily on the cord.
  • the outer cross-sectional dimension of the body 12 is one to five, here approximately three, times the diameter of the cord 5 and the outer length of the body does not exceed the diameter of the cord multiplied by five, the length being preferably in the interval one to three times the cord diameter.
  • the outer dimensions of the body ensure that the cord 5, when moving the bar 3 downwards in the direction of the arrow A, is forced outwards in the direction of the arrow B towards the side member 10c of the window aperture.
  • the cord tightening means in this case the spring 13, ensures that the cord 5 yields to the load from the body 12.
  • the body 12 When moving the bar further downwards the body 12 is brought into engagement with the bar 3 to attain the position shown in Fig. 3 and the cord tightening means 13 pulls the cord 5 back to its normal position.
  • a user operating the screening arrangement has during the braking operation experienced a slightly increasing tension of the cord 5 after which the cord is relaxed, thus obtaining the desired indication of the screening position.
  • Fig. 4 shows a detachable connection between the braking member 21 and the cord 4 by means of a screw 20.
  • the connection could as well be performed by means of a spring-biassed catch engaging the cord or in any other way. From this Figure it further emerges that the body 21 is designed with rounded end portions in order to ease the engagement with the bar 3.
  • Fig. 5 an alternative embodiment of the braking member is shown as a spherical body 31.
  • the body 31 is inseparably connected to the cord 4 by means of moulding, gluing, heatshrinking or in any other way.
  • the parallel guidance system may as described in Applicant's international patent application published under No. WO98/32944 be provided in the form of a separate system for mounting on a window screening arrangement and comprising a hollow mounting bar for connection with the bottom bar, profile of strip at the free end of the screening body. It is clear that a braking device according to the invention may advantageously be delivered together with such a system.
  • an electrically operated driving device may be connected with the bottom or mounting bar of the window screening arrangement.
  • the window screening arrangement in the above embodiments is described as a roller blind, the invention is not limited to this kind of screening arrangement, and could eg. be a black-out curtain, a pleated blind or a Venetian blind.
  • the light imperviousness may be obtained by a flap, flange or sealing connected with the bottom or mounting bar.
  • the invention should not be regarded as being to limited to use with any particular kind of window, but may be used in all kinds of apertures or windows in the form of facade windows, roof windows, skylights etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)

Description

The present invention relates to a window screening arrangement, said screening arrangement being intended for mounting in a window aperture defined between a top member, a bottom member and two side members, and comprising a body of screening material which in an unscreening position is rolled up, collapsed or pleated at the top member and which in a free end is connected with at least one hollow bar extending substantially in parallel with the top and bottom members between the side members substantially throughout the width of the window aperture, and a parallel guidance system comprising two cords in reverse mounting, each cord being passed from a first fixture means at the top member along one side member, through the hollow bar and along the other side member to a second fixture means at the bottom member, a cord tightening means being provided in connection with at least one fixture means, in which the braking device comprises at least one braking member for retaining the hollow bar in at least one screening position.
In order to retain the bar at the free end of a screening arrangement in a position in which the window is at least partially screened, many different types of arresting or braking devices have been contemplated.
In its simplest form, an arresting device may eg. consist of side rails positioned at the window aperture side members and comprising a number of downwards facing recesses for engagement with the bar or pins connected therewith.
However, such a design is not suitable for all fields of usage.
FR patent application No. 2 615 240 and US patent No. 785,806 represent one category of braking devices, in which the braking force of the braking device is adjusted by tightening the cords of the parallel guidance system. As a consequence of the design, operation of the screening arrangement may be difficult, as the braking force has to be surmounted in order to move the screening arrangement between the top and bottom members of the window aperture. This is particularly the case in roller blinds comprising a roller bar, the spring-bias of which the braking force has to counteract.
US patent No. 612,606 represents another category in which friction shoes at each end of the bottom bar cooperate with the side members of the aperture in order to retain the bar in the desired position. As the friction shoes are biassed by springs placed in the bar, the latter have to be deactivated in order to move the screening arrangement. Although operational comfort is provided once the friction shoes have been retracted from their frictional engagement with the side members, this arrangement is complicated and thus costly and cumbersome to produce and mount.
EP patent No. 0 725 885 discloses a roller blind comprising a braking device of the initially stated kind which alleviates many of the disadvantages of the prior art arrangements. The braking device of this document comprises a friction member mounted in the bottom bar, in which at least one reversing member provides for at total change of the direction of the corresponding cord. Although this arrangement has turned out to work efficiently, it is only comparatively simple, as eg. the threading of the cords has to be carried out properly in order to provide the desired frictional braking force. Furthermore, due to the position of the braking device inside the bottom bar, it is virtually impossible to substitute a defect braking device or provide new cords in the parallel guidance system without discarding the entire window screening arrangement or at least the bottom bar.
On this background it is the object of the present invention to improve a braking device of the initially stated kind, in which the manufacture and mounting of the braking device is less complicated and in which the parts of the window arrangement may easily be exchanged.
For this purpose, a window screening arrangement according to the invention is characterized in that said at least one braking member of the braking device is mounted substantially stationarily on at least one of said cords and is intended, in a screening position, to engage with said hollow bar.
By this simple design the braking device and consequently the entire window screening arrangement is simpler and cheaper to manufacture and mount. Furthermore, the braking device may be provided separately, possibly together with the parallel guidance system. It is thus easy to substitute parts of the screening arrangement and it is possible to mount eg. the braking device subsequently on existing screening arrangements not being provided with such a device. Eventually, an indication of the desired screening position is obtained at the moment of engagement between the braking member or members and the bar, which may be advantageous in order to attract the user's attention eg. when the screening arrangement has reached its bottom position to prevent further downwards movement of the screening arrangement.
In a preferred embodiment, each braking member is designed as a symmetrical body, the axis of symmetry of which is substantially parallel with the corresponding cord. By this embodiment, a safe engagement between the braking device and the bar is secured at all times, independently of the rotation or twisting of the cords.
In a constructionally simple embodiment the braking member or members may be designed as hollow body for accommodation of the cord.
Preferably, the braking device comprises at least one pair of braking members placed opposite each other at substantially the same distance from the top member of the window aperture. By this design, the load on the cord system and the tightening means is symmetrical and an aesthetically attractive arrangement is obtained.
Further features and advantages will appear from the remaining dependent claims.
The invention will now be explained in detail with reference to the schematic drawings, in which
  • Fig. 1 shows a front view of a window screening arrangement according to the invention,
  • Figs. 2 and 3 show, on a larger scale, partial sectional views of a detail of the screening arrangement in the beginning and at the end, respectively, of the braking operation,
  • Fig. 4 shows, on a larger scale, a sectional view of another embodiment of the screening arrangement according to the invention, and
  • Fig. 5 a view corresponding to Fig. 4 of a further embodiment of the invention.
    • In the embodiments shown in the Figures of the drawing, the window screening arrangement according to the invention is designed as a roller blind having a body of screening material in the form of a web 2. The web 2 is in one end fastened to and, in the position shown, partially rolled up on a roller bar 1 placed at a top member 10a which together with a bottom member 10b and two side members 10c,10d defines a window aperture 10. In the opposite free end the web 2 is connected with a bottom bar 3 which extends substantially in parallel with the top and bottom members 10a and 10b between the side members 10c,10d substantially throughout the width of the window aperture 10. The parallelism of the bottom bar 3 is secured by a parallel guidance system which comprises a pair of cords 4,5 mounted in reverse of each other as will be explained in the following.
    The cords 4,5 are in one end fastened to a respective one of a first fixture means 7 and 6 situated at the top member 10a near or at the side members 10c and 10d, respectively. From the fixture means 7,6 the cords 4,5 are passed along a respective one of the side members 10c,10d and through the bottom bar 3, which is formed with a through-going hollowness. During the passage through the bottom bar 3, the cords 4,5 cross each other such that they on the other side are passed downwards along the opposite side members 10d,10c to a second fixture means 8 and 9, respectively. Cord tightening means 14,13 are provided in connection with the first fixture means 7,6. In the embodiment shown each cord tightening means 14,13 comprises a spring connected with each of the fixture means 7,6 but may instead be provided as an elastic cord.
    In order to operate the screening arrangement from the initial position, ie. when the web 2 is completely rolled up on the roller bar 1, a pull is exerted on the bar 3 which moves downwards and is as described in the above kept in parallel with the top and bottom members 10a,10b. In a position, in which the window aperture is at least partially screened, the screening arrangement is arrested or parked in the desired position by means of a braking device as will be explained in the following.
    In the embodiment shown, the braking device according to the invention comprises two braking members 11,12 mounted on the cords 4 and 5, respectively, opposite each other and substantially at the same distance from the top member 10a of the window aperture. As most clearly shown in Figs. 2 and 3, the braking member 12 is designed as a hollow cylindrical body mounted substantially stationarily on the cord. The outer cross-sectional dimension of the body 12 is one to five, here approximately three, times the diameter of the cord 5 and the outer length of the body does not exceed the diameter of the cord multiplied by five, the length being preferably in the interval one to three times the cord diameter.
    The outer dimensions of the body ensure that the cord 5, when moving the bar 3 downwards in the direction of the arrow A, is forced outwards in the direction of the arrow B towards the side member 10c of the window aperture. During this braking operation, the cord tightening means, in this case the spring 13, ensures that the cord 5 yields to the load from the body 12. When moving the bar further downwards the body 12 is brought into engagement with the bar 3 to attain the position shown in Fig. 3 and the cord tightening means 13 pulls the cord 5 back to its normal position. A user operating the screening arrangement has during the braking operation experienced a slightly increasing tension of the cord 5 after which the cord is relaxed, thus obtaining the desired indication of the screening position.
    Fig. 4 shows a detachable connection between the braking member 21 and the cord 4 by means of a screw 20. The connection could as well be performed by means of a spring-biassed catch engaging the cord or in any other way. From this Figure it further emerges that the body 21 is designed with rounded end portions in order to ease the engagement with the bar 3.
    In Fig. 5 an alternative embodiment of the braking member is shown as a spherical body 31. The body 31 is inseparably connected to the cord 4 by means of moulding, gluing, heatshrinking or in any other way.
    The parallel guidance system may as described in Applicant's international patent application published under No. WO98/32944 be provided in the form of a separate system for mounting on a window screening arrangement and comprising a hollow mounting bar for connection with the bottom bar, profile of strip at the free end of the screening body. It is clear that a braking device according to the invention may advantageously be delivered together with such a system.
    Furthermore, an electrically operated driving device may be connected with the bottom or mounting bar of the window screening arrangement.
    It is further evident that more than the shown one pair of braking members placed at the same distance from the top member of the window aperture may be provided in order to provide a plurality of screening positions.
    Although the window screening arrangement in the above embodiments is described as a roller blind, the invention is not limited to this kind of screening arrangement, and could eg. be a black-out curtain, a pleated blind or a Venetian blind. In the case of light-proof screening arrangements having covering elements along the edges of the aperture, the light imperviousness may be obtained by a flap, flange or sealing connected with the bottom or mounting bar.
    Eventually, the invention should not be regarded as being to limited to use with any particular kind of window, but may be used in all kinds of apertures or windows in the form of facade windows, roof windows, skylights etc.

    Claims (12)

    1. A window screening arrangement for mounting in a window aperture (10) defined between a top member (10a), a bottom member (10b) and two side members (10c,10d), and comprising a body (2) of screening material which in an unscreening position is rolled up, collapsed or pleated at the top member (10a) and which in a free end is connected with at least one hollow bar (3) extending substantially in parallel with the top and bottom members (10a, 10b) between the side members (10c,10d) substantially throughout the width of the window aperture, and a parallel guidance system comprising two cords (4,5) in reverse mounting, each cord being passed from a first fixture means (7,6) at the top member (10a) along one side member (10c,10d), through the hollow bar (3) and along the other side member (10d,10c) to a second fixture means (8,9) at the bottom member (10b), a cord tightening means (14,13) being provided in connection with at least one fixture means (7,6), and a braking device comprising at least one braking member (11,12;21;31) for retaining the hollow bar (3) in at least one screening position,
         characterized in that
         said at least one braking member (11,12;21;31) of the braking device is mounted substantially stationarily on at least one of said cords (4,5) and is intended, in a screening position, to engage with said at least one hollow bar (3).
    2. A window screening arrangement according to claim 1, characterized in that each braking member (11,12;21;31) is designed as a symmetrical body, the axis of symmetry of which is substantially parallel with the corresponding cord (4,5).
    3. A window screening arrangement according to claims 1 or 2, characterized in that each braking member (11,12) is designed as a hollow body for accommodation of said cord (4,5).
    4. A window screening arrangement according to claims 1, 2 or 3, characterized in that the outer shape of the body (11,12;21) is a cylinder or a frustum of a cone.
    5. A window screening arrangement according to claim 4, characterized in that the cylinder (11,12;21) or the frustum is designed with rounded end portions.
    6. A window screening arrangement according to any of claims 1 to 3, characterized in that the outer shape of the body (31) is spherical.
    7. A window screening arrangement according to any of the preceding claims, characterized in that each braking member (21) is detachably connected to the corresponding cord (4).
    8. A window screening arrangement according to claim 7, characterized in that the braking member (21) is connected to the corresponding cord (4) by means of a screw (20) or a spring-biassed catch.
    9. A window screening arrangement according to any of claims 1 to 6, characterized in that each braking member (31) is inseparably connected to the corresponding cord (4) by means of moulding or gluing.
    10. A window screening arrangement according to any of the preceding claims, characterized in that each braking member (11,12;21;31) has an outer cross-sectional dimension of one to five, preferably one to three, times the diameter of the cord (4,5) and an outer length which does not exceed the cord diameter multiplied by five, preferably one to three.
    11. A window screening arrangement according to any of the preceding claims, characterized in that the braking device comprises at least one pair of braking members (11,12;21;31) placed opposite each other at substantially the same distance from the top member (10a) of the window aperture.
    12. A window screening arrangement according to any of claims 1 to 11, characterized in that the cord tightening means (14,13) are dimensioned in such a way that the cords (4,5) are held tightly throughout the operation.
    EP99911652A 1998-04-17 1999-04-12 A braking device and a window screening arrangement comprising such a braking device Expired - Lifetime EP1071861B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DK53698 1998-04-17
    DK199800536A DK176031B1 (en) 1998-04-17 1998-04-17 Ball stop designed as a window guard arresting device
    PCT/DK1999/000206 WO1999054585A1 (en) 1998-04-17 1999-04-12 A braking device and a window screening arrangement comprising such a braking device

    Publications (2)

    Publication Number Publication Date
    EP1071861A1 EP1071861A1 (en) 2001-01-31
    EP1071861B1 true EP1071861B1 (en) 2003-03-19

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    ID=8094656

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99911652A Expired - Lifetime EP1071861B1 (en) 1998-04-17 1999-04-12 A braking device and a window screening arrangement comprising such a braking device

    Country Status (11)

    Country Link
    EP (1) EP1071861B1 (en)
    JP (1) JP4302317B2 (en)
    AR (1) AR014994A1 (en)
    AT (1) ATE234994T1 (en)
    AU (1) AU3026799A (en)
    CZ (1) CZ298955B6 (en)
    DE (2) DE29923714U1 (en)
    DK (1) DK176031B1 (en)
    ES (1) ES2195553T3 (en)
    PL (1) PL198782B1 (en)
    WO (1) WO1999054585A1 (en)

    Families Citing this family (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP2661530B1 (en) 2011-01-06 2014-09-24 Hunter Douglas Industries B.V. Winding shaft drive for operating a retractable architectural covering and shaft brake module for use therein

    Family Cites Families (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US785806A (en) * 1904-06-13 1905-03-28 Curtain Supply Co Curtain-fixture.
    US2572847A (en) * 1948-02-19 1951-10-30 Adlake Co Cable operated curtain construction
    FR2615240A1 (en) * 1987-05-14 1988-11-18 Farnier & Penin Blind device balanced by cables
    DK32292D0 (en) * 1992-03-11 1992-03-11 Rasmussen Kann Ind As ROLLERGARDIN, NAME FOR DARKNESS

    Also Published As

    Publication number Publication date
    DK53698A (en) 1999-12-15
    DE69906043D1 (en) 2003-04-24
    JP4302317B2 (en) 2009-07-22
    AR014994A1 (en) 2001-04-11
    AU3026799A (en) 1999-11-08
    DK176031B1 (en) 2006-01-02
    WO1999054585A1 (en) 1999-10-28
    DE69906043T2 (en) 2004-02-19
    PL198782B1 (en) 2008-07-31
    CZ20003841A3 (en) 2001-07-11
    JP2002512332A (en) 2002-04-23
    CZ298955B6 (en) 2008-03-19
    DE29923714U1 (en) 2001-02-15
    EP1071861A1 (en) 2001-01-31
    ES2195553T3 (en) 2003-12-01
    PL343608A1 (en) 2001-08-27
    ATE234994T1 (en) 2003-04-15

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