Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/40—Manufacture
  • B42D25/405—Marking
  • B42D25/43—Marking by removal of material
  • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
  • B42D25/29—Securities; Bank notes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
  • B42D25/378—Special inks
  • B42D25/382—Special inks absorbing or reflecting infrared light
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
  • B42D25/378—Special inks
  • B42D25/387—Special inks absorbing or reflecting ultraviolet light
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
  • B42D25/378—Special inks
  • B42D25/391—Special inks absorbing or reflecting polarised light

Definitions

• the present invention relates to a security feature for a security device in which the authenticity can be determined by irradiation of electromagnetic radiation in a spectral range outside the visible range.
• the invention is therefore based on the object of an alternative safety rope. To provide a feature for a security document in which the authenticity can be determined by irradiation of electromagnetic radiation in a spectral range outside the visible range.
• the security feature has a pressure or a sensor or, quite generally, a function which converts the incident electromagnetic radiation into visible light, the pressure or. the coating or the function is at least indirectly covered by a polarizing film.
• Function means that e.g. the carrier on which the security feature is applied can itself take on the function of converting the incident electromagnetic radiation into visible light.
• the essence of the invention is therefore to provide on the one hand a feature which could not be recognized by the eye when viewed under only visible light, but which suddenly appears when UV light or IR light is irradiated (see above) called photoluminescence).
• UV light it is a so-called Stokes process in which high-energy electromagnetic radiation (UV) is converted into low-energy electromagnetic radiation (visible light, VIS).
• VIS visible light
• anti-Stokes process in which electromagnetic radiation of low energy (IR) is converted into electromagnetic radiation of higher energy (VIS).
• polarization is used at the same time. This by a z. B. fluorescent coating or a z.
• B. fluorescent printing is covered with a polarizing film.
• the printing can be easily applied and, if necessary, even adapted to specific documents (e.g. printing machine register).
• a sandwich glaze is simply used in a very simple manner, which has a polarization film on top of the coating and resp. the depression or of the carrier, which converts the radiated electromagnetic radiation into visible light.
• the Service eitsmei times is a shaped, flat object which can have a wide variety of shapes, e.g. B., but not only, tape, plate, disc, sheet, etc.
• chemical functions are preferably built into this carrier, which convert the incident electromagnetic radiation into visible light.
• These chemical functions are preferably fluorescent and / or phosphorescent dyes built into the door. These can either be simply embedded in the carrier or else in the form of fibers which are colored with these dyes and which are incorporated in the carrier.
• the electromagnetic radiation emitted by steel is UV radiation.
• the irradiation can take place in a wavelength range from 200 to 500 nm or even in a range from 180 to 500 nm. Irradiation in the range from 200 to 400 nm or 300 to 400 nm is preferred.
• the pressure can then contain at least one fluorescent and / or phosphorescent material which at least partially converts the UV radiation into visible light.
• the print can particularly preferably be a logo, a pattern, or a lettering or a combination of these elements.
• the verification of such a security feature can be done either by irradiating linearly polarized UV light, the direction of polarization of this UV light rotating (for example by a rotating polarizer immediately in front of the UV - Light source is set).
• the fluorescent signs under the polarization filter appear and disappear in the interplay. In other words, there is a light-dark or on / off effect. This effect can be seen very clearly and allows a reliable verification, on the other ropes this effect can only be copied with great effort.
• Polarization filters in which the absorption is essentially limited to the wavelength range of the irradiated excitation radiation and which is essentially in the visible range, i.e. typically in a range of 400-800 nm, have no absorption and therefore appear colorless.
• Polarizing filters with these properties enable the described effect in the sense of the present invention, but without disturbing any visible printed image.
• the printing preferably contains at least one photoluminescent dye and / or a phospholuminescent pigment or a combination of such components. It can be dyes such. 13. Pergasol Flavin 7G, Pergasol Yellow G ⁇ , etc. act, but also optical brighteners such. B. Blankophore, Uvitex OB-Oue etc. can be used. Components based on metal ions or generally metals are also possible. Of course, the effect can be further improved by using different areas with different colors.
• the polarizing film preferably has a thickness in the range from 5 to 200 ⁇ m, particularly preferably from 10 to 75 ⁇ m.
• the polarizing film should preferably have a dichroic ratio of in the range of at least 3, particularly preferably at least 5, so that the light / dark effect mentioned at the outset also emerges well.
• the polarizing film can also be a so-called photoluminescent polarizer in the sense of e.g. BM Eglin et al., "Ultra-high performance photoluminescent polarizers based on elt-processed poly er blends," J. Mater. Chem. 1999, vol. 9, p. 2221, act.
• a polarizing film an interesting color change effect can be achieved if the emission color of the polarizing film differs from the emission color of the substrate or the underlying imprint !.
• a feature consisting of a photoluminescent substrate and an overlying photoluminescent polarizer is viewed under polarized UV light, which periodically changes its polarization axis, either the emission of the polarizing film or the emission of the substrate is also periodically visible. If the polarization directions of polarization film and excitation light match, the light energy is absorbed and is no longer available for excitation of the substrate, which is why only the emission of the polarization film is visible.
• the polarization directions of the polarizing film and the excitation light are perpendicular to one another, there is no interaction with the chromophores of the polarizing film, which is why the excitation energy penetrates unhindered to the substrate and stimulates it to photoluminescence.
• a polarizing film should not absorb in the visible range, or at least in the range in which the substrate emits !, ie it should be colorless.
• Another preferred embodiment of the present invention is characterized in that the security feature lies over regions of polarization film with a different polarization direction arranged directly next to one another. So when looking at z. B. a rotating polarization filter, the printed characters towards these different areas also in different line sections, which produces a very interesting flick-flack effect.
• the polarization directions of adjoining regions can particularly preferably be orthogonal to one another, but it is also possible to obtain a moving subject with a certain wetness when viewed under a rotating polarization filter by using elirer strips with successively changing polarization directions.
• Another preferred embodiment of the present invention is characterized in that See. hei feature is applied to a carrier material, the pressure being at least indirectly printed on the carrier material, and the Polarization film isl connected via a halogen mediator on this print.
• This Ausfiirungsfo ⁇ n proves to be particularly easy to manufacture, since the carrier material in a standard process are simply provided with a photoluminescent printing, and then z. B. with a pressure sensitive adhesive (hot or cold) polarizing film (gcwisse ⁇ uassen in the sense of a Scotch tape) must be glued to this printing area.
• the phololuminescent printing is to some extent applied to the polarizing film. It is characterized in that the security feature is applied to a carrier material, the pressure being arranged on the side of the polarizing film facing the carrier material, and the polarizing film having the side facing the pressure being applied to the carrier material via an adhesive, where appropriate a film is arranged between the print and the adhesive layer.
• a polarizing film provided with a photoluminescent print and coated with an adhesive can simply be dispensed onto the carrier material.
• the adhesive agent is preferably a glue, paste, varnish, dispersion adhesive, solution adhesive, reaction adhesive or a contact adhesive which has an adhesion which is sufficient in accordance with the intended use of the security agent.
• the adhesive in the embodiment in which the adhesive is arranged midway between the printing and the polarizing film because care should be taken to ensure that the adhesive in the spectral regions used (e.g. UV and VIS) has no absorption properties, otherwise the effect is cleaved.
• the security feature can have a structure in which at least one printing layer is covered on both sides by a polarizing film, the two polarizing films having the same or different polarization direction.
• Another embodiment of the present invention is characterized in that the polarizing film is also provided with a fluorescent print on the other, upper surface.
• this fluorescent print is not behind the polarizing film when viewed from the same side as the radiation, and accordingly this pressure remains independent of the position of a z. B. rotating used in observation. Polarization filter always visible. This can lead to interesting contrast effects with the periodically incoming / outgoing signals of the printing arranged behind the polarizing film. Further preferred embodiments of the security feature are described in the dependent claims.
• the present invention relates to a security document containing a security feature as described above.
• This can be a banknote, a security, a ticket, packaging material, etc., or a cold credit, bank card, etc.
• the present invention relates to a method for producing a security document, as mentioned in the previous paragraph.
• the fluorescent print in particular in the form of a logo, pattern, or lettering, is first applied to a carrier material, and then a polarizing film provided with an adhesive is stuck to the printed area.
• a method for producing such a security document is proposed, which is characterized in that a sieve, which is already provided with a fluorescent print arranged between the adhesion promoter and the polarizing film, is glued onto a carrier material.
• the present finding also relates to a method for verifying a security feature as described at the beginning or a security document as mentioned above.
• the method for verification is characterized in that either linearly polarized UV light is irradiated, the direction of polarization of which rotates, or that non-polarized UV light is irradiated and the observation in the visible range takes place through a rotating polarization filter. The light / dark or on / off effect already mentioned appears.
• the observation can either take place on the side in the incident light of the security document from which the irradiation takes place, or an observation can be carried out by looking through (transmission).
• Fig. 5 functional mechanism when irradiated with non-polarized UV light, the observation being done through a polarization filter, the direction of polarization a) is aligned parallel to the polarization direction of the polarization film and b) orthogonal to the polarization direction of the polarization film
• FIG. 6 functional mechanism in an arrangement corresponding to FIG. 5, the polarization film having regions with different polarization directions; 7 shows a section through a laminated polarizing fiber with a polarizing sheath; and
• the security document has a carrier 1.
• the carrier 1 can be a paper or a plastic film or a mixed form thereof, or a plastic disc (see e.g. credit card).
• the carrier itself contains a fluorescent dye or a pigment.
• this high-speed material can be simply added in the paper manufacturing process.
• fibers with a fluorescent dye it is also possible to add fibers with a fluorescent dye, and then add these fibers to the pulp during the paper production process, so that only these egg-colored fibers subsequently show a fluorescence effect.
• the usual fluorescent dyes or fluorescent pigments are suitable as dyes, the dyes can be inorganic or organic in nature and can also contain metals or metal ions.
• the dyes can be inorganic or organic in nature and can also contain metals or metal ions.
• B. Uvilex OB ONE Aldrich 368590
• Pergasol Yellow 8 GA Ciba Specialty Chemicals
• Tinopal ABP Bayer
• Oxonol Aldrich 44052-3
• Keystone Fluorescent Colors etc.
• Dyes with similar properties can be used in the field of optical Brighteners are found, so z.
• adhesion promoter 3 between the carrier and polarizing film, which ensures a firm connection between carrier medium 1 and polarizing film 2.
• the detergent used should not show any significant absorption in any of the relevant spectral ranges.
• the polarization film 2 has a thickness of 10 to 30 ⁇ m. you Political degree is approx. 18. A dichroic ratio of approx. 5 or higher is also possible.
• Dark polarizing filters can e.g. B. from Sumitomo or Polaroid, or can be produced according to a standard polymer stretching process.
• the polarization filter in the relevant spectral regions is essentially polarizing, namely e.g. B. when irradiated with UV light, if possible, both in the UV range and in the visible range.
• FIG. 1 b shows a further exemplary embodiment in which a photoluminescent diuck 4 is applied to the carrier 1.
• This print can be applied in a standard printing process such as ink jet, gravure, offset printing, etc., and it can be font, images, logos, patterns or combinations of delicate elements, and different colors can be used side by side , There is initially over the print 4
• Such Sichcrheilsmetkmal can be made by, after the depression with the layer or the pressure 4 z. B. a roll already provided with the adhesion promoter 3 polarization film 2 is dispensed. If the Hall mediator is a contact connector, this can e.g. B. using a laminate, in which the polarizing film and adhesive agent are covered with a separating film, and this separating film is separated from the polarizing film shortly before application, so that the adhesive film 3 remains on the polarizing film 2.
• FIG. 2a Another embodiment is shown in Fig. 2a).
• the pressure 4 is not between Ilafivermilter 3 and Tiägermalerial 1, but rather between Halmillilller 3 and polarizing film 2.
• a deiartigcs security feature can z. B. be dispensed onto a base carrier material 1, but then the donor material already contains the fluorescent print 4 between the adhesion promoter 3 and the polarizing film 2.
• FIG. 2b it is possible, in order not to let the pressure 4 come into direct contact with the Ha 11 mediator 3, to arrange a film 5 between these two layers.
• FIG. 3a Another embodiment is shown in Fig. 3a).
• the security feature is built into the carrier material 1 to a certain extent.
• the carrier material 1 has a hole in the area of the security feature.
• the security feature has the same thickness as the carrier material.
• the top of the security label is delimited by an upper polarizing film 6, and an upper fluorescent printing layer 8 is arranged directly below this upper polarizing film 6.
• a separating film 10 now follows downwards, as it were in the middle of the carrier material 1. This film can either be transparent or opaque.
• a lower fluorescent printing layer 9 now follows to the underside, and the security feature is closed off to the underside by a lower polarizing film 7.
• a specific security feature looks different depending on the viewing side, provided that the two printing layers 8 and 7 are not configured exactly the same. If the separating film 10 is made transparent, it is also possible to look through it.
• 3b shows an exemplary embodiment, in which the security feature in turn is arranged in the carrier material 1 in a window of this carrier material.
• the security feature in turn is arranged in the carrier material 1 in a window of this carrier material.
• only one fluorescent printing layer 4 is arranged between two polarizing films 6 and 7.
• z is a transparent window under normal conditions.
• the safety feature appears essentially the same even when viewed through (UV light source on one side, viewing from the other ropes), as if radiation and viewing from the same side respectively.
• the window will appear dark when viewed through, because two oil-horizontally arranged polarizers do not let light through.
• the print 4 would not be visible if the dye shows a polarized emission in the sievable region which is parallel to Polarization direction of the radiation takes place.
• the substance shows an unpolarized emission in the visible range when the radiation is polarized (the radiation is always polarized due to the polarization film above it), even with crossed polarization films, the pressure is visible, even if weakened, with such a review.
• Fig. 3c An even more complex embodiment is shown in Fig. 3c). Essentially, this is an export example according to. Fig. 3b) but in addition on the outside on the two polarizing foils 6 and 7 a further fluorescent Duick 12 is arranged.
• This pressure 12 will not show any light / dark or on / off effect if observation and irradiation follow from the same side of the carrier material 1 egg, since the respective polarization filter is not arranged above it. However, if such a security feature is viewed in transparency, these prints 12, if arranged on the side facing away from the viewer, show the on / off effect, provided that the two polarizing foils 6 and 7 are anoided in parallel.
• FIG. 4 shows the method for the verification of a similar security feature, wherein radiation is irradiated with linearly polarized UV light 13.
• the polarized UV light 13 has a direction of polarization, which is shown by the arrow 14.
• the security document in turn has a carrier material 1 on which a fluorescent Daick 4 is arranged behind a polarizing film 2.
• the direction of polarization of the polarization film 2 is indicated by the arrow 17.
• FIG. 4 a) if the polarization direction 14 of the incident UV light and the polarization direction 17 of the polarization film 2 are arranged in parallel, the printing 4 is visible in the visible area, as indicated by the arrow 15 in the viewer 16 is.
• the polarization direction 14 of the incident UV light 13 is perpendicular to the polarization direction 17 of the polarization film 2, no visible light is emitted by the printing 4 and can be scrapped by the operator 16. Accordingly, the lettering will appear alternately and disappear again if the polarization direction 14 is successively rotated. This is e.g. B. possible by one A light polarization filter is connected upstream of the UV light source and rotates at a certain speed.
• FIG. 5 shows an alternative method of verifying the security feature.
• This is non-polarized UV light 18 that is radiated in.
• the UV love is linearly polarized when passing through the polarizing film 2, strikes the printing 4, is converted there into visible light and emerges in the direction of the viewer, having a polarization direction which is parallel to the polarization direction of the polarizing film 2.
• the viewer 16 now looks at this signal with the aid of a polarization filter 19, and if this polarization filler 19 is aligned with its polarization direction 20 parallel to the polarization direction 17 of the polarization film 2, then the bachachler will perceive the lettering (situation in FIG. 5a).
• the polarization direction 20 of the polarization filter 1 and the polarization direction 17 of the polarization film 2 are arranged orthogonally, the viewer will see a signal of the train 4 (situation FIG. 5b).
• FIG. 6 shows an embodiment analogous to that shown in FIG. 5, but here the polarization film 2 has areas 2a and 2b which have different polarization directions 17a and 17b, respectively.
• a pressure 4 arranged behind this polarization film 2 will appear depending on the relative arrangement of the polarization direction 17a or 17b of the region 2a or 2b and the polarization direction 20 of the polarization filter 19.
• the two polarization directions J7a and 17b are arranged orthogonally to one another, a lettering will either have just disappeared or will be just visible, i.e. H. part of the lettering will always be visible, the lettering possibly also being easily visible as a whole if the polarization directions 17 and 20 are arranged in the region of 45 degrees.
• FIG. 7 shows a section through a laminated melicr fiber 22.
• the actual core 24 of the Mch ' detector which for example is made of a plastic or plastic material, serves as the fluorescent substrate can also consist of lyocell or a natural fiber.
• the core 24 is suspended, for example, in a dye which is capable of converting the desired conversion of light from half of the visible range into light within the visible range.
• the Faibsloff can be added, for example, when using a polymeric Weiksloffc before or after melting before the extrusion process, but it is also possible to add the color after shaping.
• a polarizing film 23 is arranged around this core 24.
• This enveloping polarization film 23 can be produced, for example, together with the core 24 in a co-extrusion process, the multilayer fiber then having to be stretched after this co-extrusion process so that the layer 23 actually unfolds the desired polarizing winding.
• the polarization film produced in this way shows essentially no absorption above 400 nm, i. H. in the visible spectrum it shows almost no absorption.
• such a film appears transparent and unsuspecting in the visible area
• the polarization film produced in this way shows essentially no absorption at wavelengths above 500 nm. Accordingly, it appears transparent with a slight yellow tinge.
• This film shows essentially no absorption above 420 nm. It appears transparent and colorless in the visible area.
• EXAMPLE 4 151.4 mg (0.7 mmol) of 4,4'-dihydroxyazobcnzol (synthesis described in Example 2) were dissolved in 10 ml of anhydrous pyridine. 440.0 mg (1.8 mmol) of 4-hexyloxybenzoylchloride were added with stirring at room temperature. After 2 h, the mixture was mixed with H 2 O ( 3 ⁇ 100 mL) and extracted with CII 2 CI 2 (150 mL). The organic phase was dried over MgSO 4, filtered and the solvent was spun off. The orange substance obtained was recrystallized from methanol / chloroform (1: 1).
• This polarizing film shows no absorption above 400nm and accordingly appears transparent and colorless in the visible range.
• films based on polyethylene lerephthalate (PET) with 0.2% w / w of Dyes were prepared by the same method at 280 ° C and stretched at 4 ° C at 180 ° C. These films showed an absorption maximum around 385 nm with a dichroic ratio of 27.
• This polarization film likewise shows essentially no absorption above 400 nm and appears transparent and colorless in the visible range.

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• Physics & Mathematics (AREA)
• Health & Medical Sciences (AREA)
• Electromagnetism (AREA)
• General Health & Medical Sciences (AREA)
• Optics & Photonics (AREA)
• Toxicology (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Business, Economics & Management (AREA)
• Accounting & Taxation (AREA)
• Finance (AREA)
• Credit Cards Or The Like (AREA)
• Inspection Of Paper Currency And Valuable Securities (AREA)
• Polarising Elements (AREA)
• Printing Methods (AREA)

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• 2003
  • 2003-02-28 EP EP03702269A patent/EP1523415B1/fr not_active Expired - Lifetime
  • 2003-02-28 WO PCT/CH2003/000146 patent/WO2004009373A1/fr not_active Application Discontinuation
  • 2003-02-28 AT AT03702269T patent/ATE514562T1/de active
  • 2003-02-28 AU AU2003205497A patent/AU2003205497C1/en not_active Ceased

Non-Patent Citations (1)

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