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Todd W. Johnson

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  • St. Paul, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Light directing film
    • Patent number 7,950,838
    • Issue date May 31, 2011
    • 3M Innovative Properties Company
    • Todd M. Johnson
    • G02 - OPTICS
  • Information Patent Grant

    Self-sealing liquid filter
    • Patent number 5,702,603
    • Issue date Dec 30, 1997
    • Todd W. Johnson
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Flexible filter bag and method of fabrication
    • Patent number 4,877,526
    • Issue date Oct 31, 1989
    • Minnesota Mining and Manufacturing Company
    • Todd W. Johnson
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Patents Applicationslast 30 patents