TREA

Shirley A. Harold

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Patents Applicationslast 30 patents

  • Information Patent Application

    Reverse flow air filter arrangement and method
    • Publication number 20040006955
    • Publication date Jan 15, 2004
    • Donaldson Company, Inc.
    • Donald Francis Engel
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    Reverse flow air filter arrangement and method
    • Publication number 20020092282
    • Publication date Jul 18, 2002
    • Donaldson Company, Inc.
    • Donald Francis Engel
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    Reverse flow air filter arrangement and method
    • Publication number 20020014058
    • Publication date Feb 7, 2002
    • Donaldson Company, Inc.
    • Donald Francis Engel
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL