P b downing inventor of computer

  • P b downing inventor of computer network

    • Back then, anyone interested in mailing a letter would have to make the long trip to the post office. Philip Downing designed a metal box with four legs, which he patented on October 27, 1891. What’s known today as a mailbox,

    P b downing inventor of computer science

  • Philip b. downing

    • P b downing inventor of computer technology

      P b downing inventor of computer network
    P b downing inventor of computer science Philip b. downing
    P b downing inventor of computer technology P b downing inventor of computer