David D. Abbott

Person

  • Downingtown, PA, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Chemical print element

    • Patent number 4,343,555
    • Issue date Aug 10, 1982
    • Exxon Research and Engineering Co.
    • David D. Abbott
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS