Patents Assigned to Edu-Science (H.K.) Limited
  • Toy pinhole camera
    Patent number: D401634
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: November 24, 1998
    Assignee: Edu-Science (H.K.) Limited
    Inventor: Chi-Man Wong
  • Toy microscope
    Patent number: D401976
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: December 1, 1998
    Assignee: Edu-Science (H.K.) Limited
    Inventor: Chi-Man Wong
  • Toy periscope
    Patent number: D401977
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: December 1, 1998
    Assignee: Edu-Science (H.K.) Limited
    Inventor: Chi-Man Wong
  • Toy telescope
    Patent number: D401978
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: December 1, 1998
    Assignee: Edu-Science (H.K.) Limited
    Inventor: Chi-Man Wong