Patents Examined by R. B. Davis
  • Mold forming method
    Patent number: 5244620
    Abstract: A mold forming method includes steps of preparing a master having pores corresponding to an original image, holding the master under a predetermined tension, applying a mold forming material to the master, and hardening the mold forming material to produce a mold having an image corresponding to the original.
    Type: Grant
    Filed: April 30, 1991
    Date of Patent: September 14, 1993
    Assignee: Riso Kagaku Corporation
    Inventor: Koichi Uchiyama