TREA

Calvin Derr

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  • Chicago, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rotary damper
    • Patent number 7,510,062
    • Issue date Mar 31, 2009
    • Illinois Tool Works Inc.
    • Calvin Derr
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Grant

    Small viscous precision damper
    • Patent number 6,298,960
    • Issue date Oct 9, 2001
    • Illinois Tool Works Inc.
    • Calvin Derr
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Reverse air damper with latching mechanism
    • Patent number 6,213,454
    • Issue date Apr 10, 2001
    • Illinois Tool Works Inc.
    • Steven L. Bivens
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    LATCHING RACK DAMPER ASSEMBLY
    • Publication number 20080224370
    • Publication date Sep 18, 2008
    • CALVIN DERR
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Application

    Rotary damper
    • Publication number 20070108000
    • Publication date May 17, 2007
    • Calvin Derr
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES