EP0328320A1 - Sicherheitsvorrichtung - Google Patents

Sicherheitsvorrichtung Download PDF

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Publication number
EP0328320A1
EP0328320A1 EP89301071A EP89301071A EP0328320A1 EP 0328320 A1 EP0328320 A1 EP 0328320A1 EP 89301071 A EP89301071 A EP 89301071A EP 89301071 A EP89301071 A EP 89301071A EP 0328320 A1 EP0328320 A1 EP 0328320A1
Authority
EP
European Patent Office
Prior art keywords
photochromic
yarn
security device
light
label
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.)
Withdrawn
Application number
EP89301071A
Other languages
English (en)
French (fr)
Inventor
Peter Wright
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.)
Akzo Nobel UK PLC
Original Assignee
Courtaulds PLC
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 Courtaulds PLC filed Critical Courtaulds PLC
Publication of EP0328320A1 publication Critical patent/EP0328320A1/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • G09F3/0294—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time where the change is not permanent, e.g. labels only readable under a special light, temperature indicating labels and the like
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H1/00—Marking textile materials; Marking in combination with metering or inspecting
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06Q—DECORATING TEXTILES
    • D06Q1/00—Decorating textiles

Definitions

  • This invention relates to a security device for use in marking articles such as goods, packages or identification cards to prove their authenticity.
  • a photochromic compound is a compound that under­goes a colour change when irradiated with light of a certain wavelength, which colour change is usually rever­sible. In general the compounds become coloured when irradiated with UV light and convert to a pale or colour­less form in visible light.
  • GB-A-1,600,615 describes coating a film with a photochromic compound and using the coated film as a means for holographic data storage.
  • FR-A-1,588,282 describes a process for producing polyvinylidene chloride, polyester, polyacrylonitrile, polypropylene or polyamide fibre containing an indolino-spiropyran photochromic compound.
  • the photochromic compound is incorporated into the spinning dope prior to spinning the fibre.
  • the photochromic compound can be fixed to a fibre by soaking the fibre with a solution of the photochromic compound
  • JP-A-60-21975 describes a method for producing a photochromic fibre in which a spiropyran compound is mixed with a monomer, fibre is impregnated with the monomer and the monomer is polymerised within the fibre. It is stated that the fibre can be used for clothes, dresses, parasols and bags for special fashion effects.
  • JP-A-61-179399 describes the preparation of a photo­chromic fibre by causing photochromic transition metal acids to adhere to or be impregnated into various fibres, and reacting the resulting product with a water-soluble condensation resin or polymerisation resin.
  • the fibres can be used as a raw material for the production of security paper or confidential documents.
  • the present invention is a novel application of photochromic compound for security purposes and accordingly provides a security device comprising woven material containing one or more threads of photochromic yarn, the yarn being substantially colourless when irradiated with visible light and reversibly converting to a coloured state when irradiated with UV light.
  • One suitable form of the device according to the invention is a label.
  • the label can be attached, by way of sewing, adhering or the like, to an authentic article such as a garment, bag, towel, linen, blanket, carpet, fabric or other textile piece good, or a non-textile article, by the manufacturer.
  • the photochromic yarn incorporated in the label is invisible under normal light conditions and so the label appears as an ordinary identification label. However, when the label is irradiated with UV light the photochromic yarn becomes coloured and is visible to the naked eye. Any article not carrying a label with a colour­able thread can be readily identified as counterfeit.
  • the photochromic yarn After irradiation with UV light, the photochromic yarn will gradually revert to colourless under normal light condi­tions, or it can be rapidly converted back by irradiating the label with strong white light.
  • the label then appears to be an ordinary identification label once more.
  • UV light sources are widely available, portable and easy to use, the irradiation not normally taking longer than a few seconds. In addition the UV light does not damage the article to which the label is attached.
  • the device according to the invention provides a convenient, harmless and relative­ly inexpensive method of protecting authentic articles against counterfeiting.
  • the photochromic yarn can be incorporated directly within the article by, for example, weaving a thread into its edge.
  • the photochromic yarn is preferably incorporated into the woven material of the security device by weaving. It may be incorporated as either a weft or warp yarn, but is preferably a weft yarn.
  • the resulting material may contain any number of photochromic threads in any suitable pattern, depending upon the desired arrangement and complexity. Surprisingly it has been found that, for white or pale materials, one single thread of photochromic yarn is sufficient for yarn to be seen when the material is ir­radiated with UV light.
  • the photochromic yarn comprises fibre containing or treated with a photochromic compound or mixture of photo­chromic compounds.
  • Two classes of generally suitable photo­chromic compounds are the spiropyrans and spiro-oxazines, although their properties must be checked to ensure they are colourless or near-colourless under normal light condi­tions.
  • Examples of spiro-pyrans and spiro-oxazines that can be used include 1′,3′,3′-trimethylindolino-6-nitroben­zospiropyran, 6,8-dichloro-1′,3′,3′-trimethyl-indolinoben­zospiropyran and spiroindolinonaphthoxazine.
  • Suitable photochromic compounds are the fulgides and fulgimides. Examples of such compounds are described in GB-A-1,442,628, 1,464,603 and 2,170,202 and in our co-pending UK Patent Application 8830336, the disclosures of which are incorporated herein by reference.
  • the photochromic compound is preferably incorporated into the fibre prior to spinning, conveniently by dissolv­ing or dispersing the photochromic compound into the spinning dope or melt.
  • Any polymeric material can be used that is capable of containing a photochromic compound and being spun into a fibre without adversely affecting the photochromic compound, and that is transparent to light having the wavelength required to convert the photochromic compound from colourless to coloured or vice versa.
  • polymeric materials that can be spun into fibre from a spinning dope into which a photochromic compound is incorporated include cellulose acetate, acrylics, for example polyacrylonitrile or polymethylmethacrylate, polyurethanes, polycarbonates, vinyl polymers, for example polyvinylalcohol, polyvinylacetate or polyvinylchloride, and regenerated cellulose.
  • cellulose acetate acrylics, for example polyacrylonitrile or polymethylmethacrylate, polyurethanes, polycarbonates, vinyl polymers, for example polyvinylalcohol, polyvinylacetate or polyvinylchloride, and regenerated cellulose.
  • Cellulose acetate, especially secondary cellulose acetate is preferred.
  • the photo­chromic compound is preferably dissolved in the spinning dope, so that it is more uniformly dispersed in the fibre formed.
  • the photochromic fulgides, spiropyrans and spiro-­oxazines for instance are soluble in a wide range of organic solvents, for example ketones such as acetone or methylethyl ketone, esters such as ethyl acetate, aromatic hydrocarbons such as toluene, chlorinated hydrocarbons such as chloroform or methylene chloride, or ethers. They are not soluble in aliphatic hydrocarbons, are reactive to some extent with lower alcohols such as methanol and ethanol and are only sparingly soluble in water.
  • ketones such as acetone or methylethyl ketone
  • esters such as ethyl acetate
  • aromatic hydrocarbons such as toluene
  • chlorinated hydrocarbons such as chloroform or methylene chloride
  • ethers for instance are soluble in a wide range of organic solvents, for example ketones such as acetone or methylethyl
  • the photochromic fulgides, spiropyrans and spiro-oxazines can readily be incorporated in an acetone-based cellulose acetate dope.
  • the photochromic compound may be mixed directly into the spinning dope, but it is preferred first to form a solution of the photochromic compound by dissolving the compound in a little of the spinning dope solvent and then mixing this into the dope.
  • the photochromic compound, in particulate form may be dispersed into the spinning dope, this being necessary, for example, when the photochromic compound is insoluble in the spinning dope, as is the case when the spinning solvent is water.
  • polymer melts into which the photochromic compound can be dispersed prior to spinning include poly­olefins for example polyethylene, polypropylene or copoly­mers thereof, polyesters for example polyethylene tereph­thalate, polycarbonates and polyamides.
  • Any conventional technique may be employed for spinning the fibre such as wet, dry, air-gap or melt spinning, although where melt spinning is carried out it is important that the temperature does not exceed that which would thermally degrade the photochromic compound.
  • the concentration of the photochromic compound in the resulting fibre is preferably 0.1 to 20% by weight based on the total weight of the fibre, more preferably 0.2 to 2%.
  • the proportion of photochromic compound in the spinning dope is generally 0.01 to 10% by weight based on the total weight of the dope, more preferably 0.04 to 1%.
  • the photochromic fibre may have a core-sheath structure, the photochromic compound being incorporated in the sheath component.
  • the polymeric material of the sheath component may be the same or dif­ferent from the polymeric material of the core component.
  • the woven material that comprises the security device may be woven from any suitable textile yarn, for example cellulose acetate, viscose, solvent-spun cellulose, cotton, wool, silk, nylon, polyester or acrylic yarn or a mixture thereof. Cellulose acetate or polyester is generally preferred.
  • Irradiation with UV light was carried out using a 125W mercury arc lamp (Phillips HPR 125W) transmitted through a 3mm thick, 300-400mm band pass filter (Schott glass UG1).
  • Irradiation with white light was carried out using a 375W photoflood lamp (Phillips PF215) transmitted through a 3mm thick, 420mm cut-off filter (Schott glass GG420).
  • a solution of photochromic compound was first prepared by dissolving 5g of the fulgide alpha-2,5-dimethyl-3-­furylethylidene (isopropylidene) succinic anhydride in 50ml acetone. The mixture was stirred for 2 hours to ensure complete dissolution.
  • acetone-based cellulose diacetate spinning dope having the following composition: Dope concentration : 27.8% w/w solids Dope viscosity : 115 Pa s (1150 poise) at 25°C Water content : 3.1% Acetyl value of flake : 54.8 Flake viscosity : 100 mPa s (100 centipoise) at 6% concentration Amount of photochromic compound : 0.25 w/w dope The dope was agitated by rolling for 24 hours to ensure complete mixing.
  • Fibre was spun from the dope using conventional dry spinning techniques.
  • the dope was maintained at a tempera­ture of 60°C and was pumped through a 42 hole x 50 micro­metres spinneret at a rate of 12 mls/min.
  • the fibre was spun into a drying cell having an upper cell temperature of 60°C and a lower cell temperature of 100°C and an air flow of 0.57 m3 (20 standard cubic feet) per minute.
  • the resulting yarn was taken up at a speed of 200 m/min on a cheesewinder. Between the take-up godet and the cheese­winder the yarn was interlaced using an air jet.
  • the resulting yarn was 167(42) (decitex 167, no. of filaments 42), and was a very pale yellow with a shiny appearance.
  • a matt yarn can be produced by adding titanium dioxide to the spinning dope.
  • a solution of photochromic compound was prepared by dissolving 0.4g of the spiropyran 1′,3′,3′-trimethylin­dolino-6-nitrobenzospiropyran in 50ml acetone. The mixture was shaken for 1 hour.
  • a 167 (42) yarn was spun from the dope using the same spinning conditions as described in Example 1.
  • the result­ing yarn was a very pale pink colour with a bright ap­pearance.
  • the photochromic yarn as produced in Example 1 was woven together with a cellulose diacetate yarn known as Dicel (Registered Trade Mark), available from Courtaulds Fibres Ltd., into a fabric.
  • the fabric had a 1 and 3 broken twill construction.
  • the warp yarn was solely Dicel, and the weft yarn was a combination of photochromic yarn (1 over 6mm) and Dicel, each photochromic region consisting of 20 picks photochromic yarn.
  • the resulting fabric was slit into a number of labels measuring 40mm x 30mm.
  • One of these labels is shown in Figures 1A and 1B.
  • the label 1 In visible light, before irradiation with UV light, the label 1 is completely white as shown in Figure 1A and the photochromic threads could not be seen.
  • magenta-­coloured stripes 2 appeared where the photochromic yarn had been woven in, as shown in Figure 1B.
  • the stripes were each approximately 7mm in width and ran along the length of the label 1 in the weft direction.
  • Subsequent irradiation with white light for 30 seconds caused the photochromic compound to revert to its near colourless form and the magenta stripes 2 disappeared, the label 1 again having the plain white appearance as shown in Figure 1A.
  • the photochromic yarn as produced in Example 1 was woven into a fabric as described in Example 3 except that the weft yarn was a combination of photochromic yarn (1 over 50mm) and Dicel, and each photochromic region con­sisted of only one single pick of photochromic yarn.
  • the resulting fabric was slit into a number of labels measuring 50mm x 30mm.
  • One of these labels is shown in Figures 2A and 2B.
  • the label 10 appears completely white.
  • the photochromic thread was clearly seen as a single magenta-­coloured line 12 against the white background as shown in Figure 2B.
  • the magenta line disappeared and the label once more was completely white.
  • the photochromic yarn as produced in Example 2 was woven into a fabric and the fabric slit into labels as described in Example 4.
  • the photochromic yarn as produced in example 1 was woven together with polyester yarn into a fabric.
  • the warp was solely 76 (24) polyester and the weft was a combina­tion of 167 (30) polyester with 4 picks of the photochromic yarn inserted every 200mm.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Artificial Filaments (AREA)
EP89301071A 1988-02-05 1989-02-03 Sicherheitsvorrichtung Withdrawn EP0328320A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB888802590A GB8802590D0 (en) 1988-02-05 1988-02-05 Fibre
GB8802590 1988-02-05

Publications (1)

Publication Number Publication Date
EP0328320A1 true EP0328320A1 (de) 1989-08-16

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Application Number Title Priority Date Filing Date
EP89301071A Withdrawn EP0328320A1 (de) 1988-02-05 1989-02-03 Sicherheitsvorrichtung

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EP (1) EP0328320A1 (de)
GB (1) GB8802590D0 (de)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0488902A1 (de) * 1990-11-29 1992-06-03 Arjo Wiggins S.A. Sicherheitsdokument mit einem Farbenphotographischen Sicherheitselement
US5289547A (en) * 1991-12-06 1994-02-22 Ppg Industries, Inc. Authenticating method
EP0621574A1 (de) * 1993-04-19 1994-10-26 Nakamura Label Co. Ltd. Texturiertes oder gedrucktes Emblem zur Verhinderung von Falschungen
WO1995033094A1 (en) * 1994-05-31 1995-12-07 I.L.C. Del Dotto S.R.L. Safety yarn and process for its manufacture
US5592561A (en) * 1994-04-14 1997-01-07 Moore; Lewis J. Anti-counterfeiting system
GB2306438A (en) * 1995-10-26 1997-05-07 Nakamura Label Inc Forgery-preventing label
EP0798415A3 (de) * 1996-02-10 1998-06-03 Hueck Folien GmbH & Co. KG Textiles Flächenelement
WO1999014416A1 (en) * 1997-09-12 1999-03-25 Nocopi Technologies, Inc. Authenticating a textile product
EP0919650A1 (de) * 1997-11-29 1999-06-02 Rinke Etiketten Karl Rinke GmbH & Co. KG Gewebtes Band, insbesondere Etikettband, und Verfahren zu dessen Herstellung und Benutzung
US6068895A (en) * 1997-08-27 2000-05-30 Nippon Dom Co., Ltd. Woven security label
ES2147473A1 (es) * 1996-05-09 2000-09-01 Customer Service S L Sistema de marcado con elementos identificadores de procedencia.
WO2000073559A1 (de) * 1999-05-29 2000-12-07 Textilma Ag Verfahren zur herstellung von etiketten mit einem unsichtbaren barcode auf einer webmaschine und etikett, hergestellt nach einem derartigen verfahren
WO2002082383A2 (en) * 2000-12-05 2002-10-17 Ambalux Corporation Detection method and apparatus
EP1533406A1 (de) * 2003-11-21 2005-05-25 Sulzer Markets and Technology AG Verfahren zur Herstellung eines Gewebes sowie ein Prüfverfahren zur Prüfung der Echtheit des Gewebes
US7427025B2 (en) 2005-07-08 2008-09-23 Lockheed Marlin Corp. Automated postal voting system and method
US7937332B2 (en) 2004-12-08 2011-05-03 Lockheed Martin Corporation Automatic verification of postal indicia products
US8005764B2 (en) 2004-12-08 2011-08-23 Lockheed Martin Corporation Automatic verification of postal indicia products
US8085980B2 (en) 2008-08-13 2011-12-27 Lockheed Martin Corporation Mail piece identification using bin independent attributes
US8171567B1 (en) 2002-09-04 2012-05-01 Tracer Detection Technology Corp. Authentication method and system
US8209267B2 (en) 2004-12-08 2012-06-26 Lockheed Martin Corporation Automatic revenue protection and adjustment of postal indicia products
US8270603B1 (en) 2000-05-24 2012-09-18 Tracer Detection Technology Corp. Authentication method and system
US20130187368A1 (en) * 2010-10-13 2013-07-25 Autoliv Development Ab Airbag for a vehicle
US9280696B1 (en) 2008-04-23 2016-03-08 Copilot Ventures Fund Iii Llc Authentication method and system
US9363083B1 (en) 2000-05-24 2016-06-07 Copilot Ventures Fund Iii Llc Authentication method and system
WO2016199173A1 (en) * 2015-06-10 2016-12-15 Council Of Scientific & Industrial Research Novel spiropyran based composition and application thereof as security tag
US10051905B2 (en) 2016-08-19 2018-08-21 Levi Strauss & Co. Laser finishing of apparel
US10712922B2 (en) 2017-10-31 2020-07-14 Levi Strauss & Co. Laser finishing design tool with damage assets
US11000086B2 (en) 2018-02-27 2021-05-11 Levi Strauss & Co. Apparel design system with collection management
US11250312B2 (en) 2017-10-31 2022-02-15 Levi Strauss & Co. Garments with finishing patterns created by laser and neural network
US11313072B2 (en) 2018-02-27 2022-04-26 Levi Strauss & Co. On-demand manufacturing of laser-finished apparel
US11484080B2 (en) 2018-11-30 2022-11-01 Levi Strauss & Co. Shadow neutral 3-D garment rendering
US11530503B2 (en) 2019-07-23 2022-12-20 Levi Strauss & Co. Three-dimensional rendering preview in web-based tool for design of laser-finished garments
US11680366B2 (en) 2018-08-07 2023-06-20 Levi Strauss & Co. Laser finishing design tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB423281A (en) * 1934-01-25 1935-01-29 Oskar Camillo Recht Improvements in paper for paper money and other documents and papers of value
FR1588282A (de) * 1968-10-01 1970-04-10
GB1600615A (en) * 1977-10-28 1981-10-21 Plessey Co Ltd Photochromic compounds
EP0169750A1 (de) * 1984-06-22 1986-01-29 Michel Jalon Aufleuchtende Sicherheitsfasern; diese Fasern enthaltende Sicherheitspapiere und andere Materialien
JPS61179399A (ja) * 1985-02-05 1986-08-12 大蔵省印刷局長 ホトクロミツク物質を付着した製紙用繊維

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB423281A (en) * 1934-01-25 1935-01-29 Oskar Camillo Recht Improvements in paper for paper money and other documents and papers of value
FR1588282A (de) * 1968-10-01 1970-04-10
GB1600615A (en) * 1977-10-28 1981-10-21 Plessey Co Ltd Photochromic compounds
EP0169750A1 (de) * 1984-06-22 1986-01-29 Michel Jalon Aufleuchtende Sicherheitsfasern; diese Fasern enthaltende Sicherheitspapiere und andere Materialien
JPS61179399A (ja) * 1985-02-05 1986-08-12 大蔵省印刷局長 ホトクロミツク物質を付着した製紙用繊維

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WPIL FILE SUPPLIER, no. 86-249926/38, Derwent Publications Ltd, London, GB; & JP-A61 179 399 (OKURASHO INSATSU KY) 12-08-1986 *

Cited By (74)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2669948A1 (fr) * 1990-11-29 1992-06-05 Arjomari Europ Document de securite comportant un element de securite ayant des proprietes photochromiques.
EP0488902A1 (de) * 1990-11-29 1992-06-03 Arjo Wiggins S.A. Sicherheitsdokument mit einem Farbenphotographischen Sicherheitselement
US5289547A (en) * 1991-12-06 1994-02-22 Ppg Industries, Inc. Authenticating method
EP0621574A1 (de) * 1993-04-19 1994-10-26 Nakamura Label Co. Ltd. Texturiertes oder gedrucktes Emblem zur Verhinderung von Falschungen
US5592561A (en) * 1994-04-14 1997-01-07 Moore; Lewis J. Anti-counterfeiting system
WO1995033094A1 (en) * 1994-05-31 1995-12-07 I.L.C. Del Dotto S.R.L. Safety yarn and process for its manufacture
GB2306438A (en) * 1995-10-26 1997-05-07 Nakamura Label Inc Forgery-preventing label
GB2306438B (en) * 1995-10-26 1997-09-17 Nakamura Label Inc Forgery-preventing textured emblem
US5824393A (en) * 1995-10-26 1998-10-20 Nakamura Label Inc. Forgery-preventing textured emblem
EP0798415A3 (de) * 1996-02-10 1998-06-03 Hueck Folien GmbH & Co. KG Textiles Flächenelement
ES2147473A1 (es) * 1996-05-09 2000-09-01 Customer Service S L Sistema de marcado con elementos identificadores de procedencia.
US6068895A (en) * 1997-08-27 2000-05-30 Nippon Dom Co., Ltd. Woven security label
US5941572A (en) * 1997-09-12 1999-08-24 Nocopi Technologies, Inc. Method for authenticating a textile product and a thread and a woven label usable therewith
EP1019574A1 (de) * 1997-09-12 2000-07-19 Nocopi Technologies, Inc. Authentifikation eines textilen produktes
EP1019574A4 (de) * 1997-09-12 2003-01-02 Nocopi Int Inc Authentifikation eines textilen produktes
WO1999014416A1 (en) * 1997-09-12 1999-03-25 Nocopi Technologies, Inc. Authenticating a textile product
EP0919650A1 (de) * 1997-11-29 1999-06-02 Rinke Etiketten Karl Rinke GmbH & Co. KG Gewebtes Band, insbesondere Etikettband, und Verfahren zu dessen Herstellung und Benutzung
WO2000073559A1 (de) * 1999-05-29 2000-12-07 Textilma Ag Verfahren zur herstellung von etiketten mit einem unsichtbaren barcode auf einer webmaschine und etikett, hergestellt nach einem derartigen verfahren
US6764970B1 (en) 1999-05-29 2004-07-20 Textilma Ag Woven labels with an invisible bar code
US8270603B1 (en) 2000-05-24 2012-09-18 Tracer Detection Technology Corp. Authentication method and system
US9811671B1 (en) 2000-05-24 2017-11-07 Copilot Ventures Fund Iii Llc Authentication method and system
US9363083B1 (en) 2000-05-24 2016-06-07 Copilot Ventures Fund Iii Llc Authentication method and system
WO2002082383A2 (en) * 2000-12-05 2002-10-17 Ambalux Corporation Detection method and apparatus
WO2002082383A3 (en) * 2000-12-05 2004-04-01 Ambalux Corp Detection method and apparatus
US9818249B1 (en) 2002-09-04 2017-11-14 Copilot Ventures Fund Iii Llc Authentication method and system
US8171567B1 (en) 2002-09-04 2012-05-01 Tracer Detection Technology Corp. Authentication method and system
US8886946B1 (en) 2002-09-04 2014-11-11 Copilot Ventures Fund Iii Llc Authentication method and system
EP1533406A1 (de) * 2003-11-21 2005-05-25 Sulzer Markets and Technology AG Verfahren zur Herstellung eines Gewebes sowie ein Prüfverfahren zur Prüfung der Echtheit des Gewebes
US7937332B2 (en) 2004-12-08 2011-05-03 Lockheed Martin Corporation Automatic verification of postal indicia products
US8209267B2 (en) 2004-12-08 2012-06-26 Lockheed Martin Corporation Automatic revenue protection and adjustment of postal indicia products
US8005764B2 (en) 2004-12-08 2011-08-23 Lockheed Martin Corporation Automatic verification of postal indicia products
US7427025B2 (en) 2005-07-08 2008-09-23 Lockheed Marlin Corp. Automated postal voting system and method
US9846814B1 (en) 2008-04-23 2017-12-19 Copilot Ventures Fund Iii Llc Authentication method and system
US9280696B1 (en) 2008-04-23 2016-03-08 Copilot Ventures Fund Iii Llc Authentication method and system
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US10275675B1 (en) 2008-04-23 2019-04-30 Copilot Ventures Fund Iii Llc Authentication method and system
US11924356B2 (en) 2008-04-23 2024-03-05 Copilot Ventures Fund Iii Llc Authentication method and system
US11600056B2 (en) 2008-04-23 2023-03-07 CoPilot Ventures III LLC Authentication method and system
US8085980B2 (en) 2008-08-13 2011-12-27 Lockheed Martin Corporation Mail piece identification using bin independent attributes
US8770622B2 (en) * 2010-10-13 2014-07-08 Autoliv Development Ab Airbag for a vehicle
US20130187368A1 (en) * 2010-10-13 2013-07-25 Autoliv Development Ab Airbag for a vehicle
US10723883B2 (en) 2015-06-10 2020-07-28 Council Of Scientific And Industrial Research Spiropyran based composition and application thereof as security tag
WO2016199173A1 (en) * 2015-06-10 2016-12-15 Council Of Scientific & Industrial Research Novel spiropyran based composition and application thereof as security tag
US20180163053A1 (en) * 2015-06-10 2018-06-14 Council Of Scientific And Industrial Research Novel Spiropyran Based Composition and Application Thereof as Security Tag
US11384463B2 (en) 2016-08-19 2022-07-12 Levi Strauss & Co. Using laser to create finishing pattern on apparel
US11673419B2 (en) 2016-08-19 2023-06-13 Levi Strauss & Co. Creating a finishing pattern on a garment by laser
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