Head accessories

Patents Grantslast 30 patents

  • Information Patent Grant

    Overhead projection having a friction secured adjustable cantilever...

    • Patent number 6,443,577
    • Issue date Sep 3, 2002
    • 3M Innovative Properties Company
    • Dwight G. Baldwin
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Overhead projector of the under mirror type

    • Patent number 6,170,954
    • Issue date Jan 9, 2001
    • Elmo Co., Ltd.
    • Mutsuo Kai
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Overhead projector with vibration control head

    • Patent number 5,465,127
    • Issue date Nov 7, 1995
    • Minnesota Mining and Manufacturing Company
    • Dwight G. Baldwin
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Latching mechanism for overhead projector post

    • Patent number 5,281,986
    • Issue date Jan 25, 1994
    • Minnesota Mining and Manufacturing Company
    • William J. E. Anton
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Overhead projector focus arm adjustment mechanism

    • Patent number 5,245,370
    • Issue date Sep 14, 1993
    • Minnesota Mining and Manufacturing Company
    • James E. Peterson
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Image display control panel for overhead projectors

    • Patent number 5,172,144
    • Issue date Dec 15, 1992
    • Keith G. Hetrick
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Retrofocus lens for overhead projector

    • Patent number 4,867,555
    • Issue date Sep 19, 1989
    • Minnesota Mining and Manufacturing Company
    • Dennis F. Vanderwerf
    • G02 - OPTICS
  • Information Patent Grant

    Overhead projector

    • Patent number 4,863,263
    • Issue date Sep 5, 1989
    • Minolta Camera Kabushiki Kaisha
    • Nobuo Kanai
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Overhead projector

    • Patent number 4,795,252
    • Issue date Jan 3, 1989
    • Buhl Industries, Inc.
    • Henry Kyhl
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Automatic focus for overhead projector

    • Patent number 4,634,246
    • Issue date Jan 6, 1987
    • Minnesota Mining and Manufacturing Company
    • John F. Dreyer
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Over-head projector with partial projection device

    • Patent number 4,353,627
    • Issue date Oct 12, 1982
    • Fuji Photo Film Co., Ltd.
    • Takashi Maemori
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3807850

    • Patent number 3,807,850
    • Issue date Apr 30, 1974
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3752575

    • Patent number 3,752,575
    • Issue date Aug 14, 1973
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3644030

    • Patent number 3,644,030
    • Issue date Feb 22, 1972
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3547530

    • Patent number 3,547,530
    • Issue date Dec 15, 1970
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3536391

    • Patent number 3,536,391
    • Issue date Oct 27, 1970
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3482911

    • Patent number 3,482,911
    • Issue date Dec 9, 1969
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3472589

    • Patent number 3,472,589
    • Issue date Oct 14, 1969
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3334957

    • Patent number 3,334,957
    • Issue date Aug 8, 1967
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3229571

    • Patent number 3,229,571
    • Issue date Jan 18, 1966
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3208337

    • Patent number 3,208,337
    • Issue date Sep 28, 1965
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3191491

    • Patent number 3,191,491
    • Issue date Jun 29, 1965
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3187625

    • Patent number 3,187,625
    • Issue date Jun 8, 1965
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3177766

    • Patent number 3,177,766
    • Issue date Apr 13, 1965
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3126786

    • Patent number 3,126,786
    • Issue date Mar 31, 1964
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    3077814

    • Patent number 3,077,814
    • Issue date Feb 19, 1963
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    2717529

    • Patent number 2,717,529
    • Issue date Sep 13, 1955
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    2596393

    • Patent number 2,596,393
    • Issue date May 13, 1952
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents