TREA

Thomas K. Johnson Jr.

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  • Chicago, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hardness and flatness tester
    • Patent number 11,686,575
    • Issue date Jun 27, 2023
    • Stepan Company
    • Thomas K. Johnson
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Hardness and flatness tester
    • Patent number 11,009,342
    • Issue date May 18, 2021
    • Stepan Company
    • Thomas K. Johnson
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Patents Applicationslast 30 patents

  • Information Patent Application

    HARDNESS AND FLATNESS TESTER
    • Publication number 20210278202
    • Publication date Sep 9, 2021
    • Stepan Company
    • Thomas K. Johnson
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    HARDNESS AND FLATNESS TESTER
    • Publication number 20200217652
    • Publication date Jul 9, 2020
    • Stepan Company
    • Thomas K. Johnson
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL