Patents Assigned to Tung On Development Co. Ltd.
  • Illuminated magnifier
    Patent number: D269184
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: May 31, 1983
    Assignee: Tung On Development Co. Ltd.
    Inventor: Thomas D. Tweedie
  • Illuminated magnifier
    Patent number: D269185
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: May 31, 1983
    Assignee: Tung On Development Co. Ltd.
    Inventor: Thomas D. Tweedie
  • Illuminated magnifier
    Patent number: D269275
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: June 7, 1983
    Assignee: Tung On Development Co. Ltd.
    Inventor: Thomas D. Tweedie