When did gregorio zara invented videophone

  • Gregorio zara children

    • A native of Lipa, Batangas, Zara finished primary schooling at Lipa Elementary Sc

    Gregorio y. zara impact to society

  • Gregorio zara contribution in science and technology

    • Gregorio zara birth place

      Gregorio zara children
    Gregorio y. zara impact to society Gregorio zara contribution in science and technology
    Gregorio zara birth place When did gregorio zara invented videophone