Patents by Inventor Hatsue Tsukada

Hatsue Tsukada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Watch case
    Patent number: D342208
    Type: Grant
    Filed: April 9, 1991
    Date of Patent: December 14, 1993
    Assignees: Seiko Instruments Inc., Seiko Epson Corporation
    Inventors: Hatsue Tsukada, Yoshito Uzawa
  • Timepiece dial
    Patent number: D342214
    Type: Grant
    Filed: April 9, 1991
    Date of Patent: December 14, 1993
    Assignees: Seiko Instruments Inc., Seiko Epson Corporation
    Inventors: Hatsue Tsukada, Yoshito Uzawa
  • Wristwatch
    Patent number: D357421
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: April 18, 1995
    Assignee: Seiko Instruments Inc.
    Inventor: Hatsue Tsukada