TREA

GERSAN ESTABLISHMENT, A LIECHTENSTEIN COMPANY

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Organization

  • STAEDTLE 36, LI
Organizations

Patents Grantslast 30 patents

  • Information Patent Grant

    Viewer for gemstones
    • Patent number D460470
    • Issue date Jul 16, 2002
    • Gersan Establishment
    • Graham Maurice Brown
    • D16 - Photography and optical equipment
  • Information Patent Grant

    Diamond marking
    • Patent number 6,391,215
    • Issue date May 21, 2002
    • Gersan Establishment
    • James Gordon Charters Smith
    • B44 - DECORATIVE ARTS
  • Information Patent Grant

    Marking diamond
    • Patent number 6,358,427
    • Issue date Mar 19, 2002
    • Gersan Establishment
    • James Gordon Charters Smith
    • B44 - DECORATIVE ARTS
  • Information Patent Grant

    Examining a diamond
    • Patent number 6,331,708
    • Issue date Dec 18, 2001
    • Gersan Establishment
    • Martin Phillip Smith
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Marking diamond
    • Patent number 6,187,213
    • Issue date Feb 13, 2001
    • Gersan Establishment
    • James Gordon Charters Smith
    • B44 - DECORATIVE ARTS
  • Information Patent Grant

    Apparatus for viewing gemstones
    • Patent number D427617
    • Issue date Jul 4, 2000
    • Gersan Establishment
    • Graham Maurice Brown
    • D16 - Photography and optical equipment
  • Information Patent Grant

    Examining a diamond
    • Patent number 6,014,208
    • Issue date Jan 11, 2000
    • Gersan Establishment
    • Christopher Mark Welbourn
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Examining a diamond
    • Patent number 5,883,388
    • Issue date Mar 16, 1999
    • Gersan Establishment
    • Martin Phillip Smith
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Examining a diamond
    • Patent number 5,880,504
    • Issue date Mar 9, 1999
    • Gersan Establishment
    • Martin Phillip Smith
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Method and apparatus for examining an object
    • Patent number 5,835,200
    • Issue date Nov 10, 1998
    • Gersan Establishment
    • Martin Phillip Smith
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Method and an apparatus for testing whether a diamond has a layer o...
    • Patent number 5,811,824
    • Issue date Sep 22, 1998
    • Gersan Establishment
    • Martin Phillip Smith
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Distinguishing natural from synthetic diamond
    • Patent number 5,801,819
    • Issue date Sep 1, 1998
    • Gersan Establishment
    • Paul Martyn Spear
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Working a natural or synthetic hard stone such as a gemstone
    • Patent number 5,746,645
    • Issue date May 5, 1998
    • Gersan Establishment
    • David William Beal
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Classifying or sorting
    • Patent number 5,628,410
    • Issue date May 13, 1997
    • Gersan Establishment
    • Martin P. Smith
    • B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
  • Information Patent Grant

    Detecting diamonds in a rock sample
    • Patent number 5,603,414
    • Issue date Feb 18, 1997
    • Gersan Establishment
    • Marie-Line Rooney
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Method and apparatus for examining an object
    • Patent number 5,536,943
    • Issue date Jul 16, 1996
    • Gersan Establishment
    • Martin P. Smith
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Method and apparatus for detecting diamonds in a plurality of objects
    • Patent number 5,505,313
    • Issue date Apr 9, 1996
    • Gersan Establishment
    • Martin P. Smith
    • B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
  • Information Patent Grant

    Controlling a feed of objects
    • Patent number 5,413,210
    • Issue date May 9, 1995
    • Gersan Establishment
    • William J. Turner
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Optical inspection method and apparatus
    • Patent number 5,353,112
    • Issue date Oct 4, 1994
    • Gersan Establishment
    • Martin P. Smith
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Sensing a narrow frequency band and gemstones
    • Patent number 5,351,117
    • Issue date Sep 27, 1994
    • Gersan Establishment
    • Andrew D. G. Stewart
    • B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
  • Information Patent Grant

    Method and apparatus for feeding articles
    • Patent number 5,305,867
    • Issue date Apr 26, 1994
    • Gersan Establishment
    • Timothy H. Leaton
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Sensing a narrow frequency band of radiation and gemstones
    • Patent number 5,206,699
    • Issue date Apr 27, 1993
    • Gersan Establishment
    • Andrew D. G. Stewart
    • B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
  • Information Patent Grant

    Shape sorting
    • Patent number 5,184,732
    • Issue date Feb 9, 1993
    • Gersan Establishment
    • Robert W. Ditchburn
    • B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
  • Information Patent Grant

    P-N-P diamond transistor
    • Patent number 5,177,585
    • Issue date Jan 5, 1993
    • Gersan Establishment
    • Christopher M. Welbourn
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Determining the existence of misorientation in a crystal
    • Patent number 5,077,767
    • Issue date Dec 31, 1991
    • Gersan Establishment
    • Michael P. Gaukroger
    • G01 - MEASURING TESTING

Trademarklast 30 trademarks

  • Information Trademark

    76224100 - DIAMONDSURE
    • Serial number 76224100
    • Filing date Mar 13, 2001
    • GERSAN ESTABLISHMENT
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
  • Information Trademark

    76223879 - DIAMONDVIEW
    • Serial number 76223879
    • Filing date Mar 13, 2001
    • GERSAN ESTABLISHMENT
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
  • Information Trademark

    75192561 - DIAMONDVIEW
    • Serial number 75192561
    • Filing date Nov 4, 1996
    • GERSAN ESTABLISHMENT
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
  • Information Trademark

    75192560 - DIAMONDSURE
    • Serial number 75192560
    • Filing date Nov 4, 1996
    • GERSAN ESTABLISHMENT
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments