using acid- based indicators

Patents Grantslast 30 patents

  • Information Patent Grant

    Slit grating, method for manufacturing the same and display device

    • Patent number 9,977,159
    • Issue date May 22, 2018
    • BOE Technology Group Co., Ltd.
    • Junwei Wang
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Switchable display system

    • Patent number 8,441,712
    • Issue date May 14, 2013
    • STMicroelectronics, Inc.
    • Michele Palmieri
    • G02 - OPTICS
  • Information Patent Grant

    Electrochromic display device and compositions useful in making suc...

    • Patent number 6,879,424
    • Issue date Apr 12, 2005
    • Aveso, Inc.
    • John B. Vincent
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Matrix addressable electrochromic display device

    • Patent number 6,639,709
    • Issue date Oct 28, 2003
    • Dow Global Technologies Inc.
    • John B. Vincent
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Glazing element, in particular for facing building facades

    • Patent number 5,864,994
    • Issue date Feb 2, 1999
    • Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    • Wolfgang Graf
    • G02 - OPTICS
  • Information Patent Grant

    Reversible radiant energy filter and process of using same

    • Patent number 3,951,521
    • Issue date Apr 20, 1976
    • Xerox Corporation
    • Eugene Findl
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    3692659

    • Patent number 3,692,659
    • Issue date Sep 19, 1972
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    3303488

    • Patent number 3,303,488
    • Issue date Feb 7, 1967
    • G02 - OPTICS
  • Information Patent Grant

    3280701

    • Patent number 3,280,701
    • Issue date Oct 25, 1966
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    3123806

    • Patent number 3,123,806
    • Issue date Mar 3, 1964
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    2632045

    • Patent number 2,632,045
    • Issue date Mar 17, 1953
    • G02 - OPTICS
  • Information Patent Grant

    1068774

    • Patent number 1,068,774
    • Issue date Jul 29, 1913
    • G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents