John J. Keegan Jr.

Person

  • Wilmington, DE, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Bar code scanner

    • Patent number 4,282,431
    • Issue date Aug 4, 1981
    • E. I. Du Pont de Nemours and Company
    • John D. Anthony
    • G06 - COMPUTING CALCULATING COUNTING