roryo spencer silver

By bussom4

  • spencer silver was born

    He was born in San Antonio TX

  • UoM ( universty of minnesota )

    1950 he moved on to the UOM majoring chemical

  • Chemisty twice

    Majored chemisty twice one time in 1962 and one time in 1966

  • What He developed

    He developed an abhesive that was strong enough to stick to walls, but left no residue after removel

  • what he invented

    Spencer silver invented post-it-notes in 1970

  • retired

    He retired in 1990

  • Death

    DIED on July 17, 2007