Patents by Inventor Akira Koitabashi

Akira Koitabashi 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).

  • Patent number: 6023947
    Abstract: The jewel holding device of the present invention comprises a claw section 4 for engaging with the crown 17 and the table 16 of a facet-cut jewel 14, an engaging, section 11 for engaging with the pavilion 21, a support seat 9 for supporting the region near the culet 20, and a contact avoiding section 7 for avoiding contact with the girdle 22; and these elements are integrally formed. The contact avoiding section 7 is formed into an arc or arcuate shape and is capable of being elastically deformed when holding the jewel 14. Viewed from the direction looking into the table 16, the end 5 of the claw section 4 engaging with the table 16 is positioned at the outer side of the support seat 9 at the lower conical section of the jewel 14.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: February 15, 2000
    Assignee: Yama Co., Ltd.
    Inventors: Kazusane Afuku, Akira Koitabashi
  • Patent number: 5974831
    Abstract: The jewel holding device of the present invention comprises a claw section 4 for engaging with the crown 17 and the table 16 of a facet-cut jewel 14, an engaging section 11 for engaging with the pavilion 21, a support seat 9 for supporting the region near the culet 20, and a contact avoiding section 7 for avoiding contact with the girdle 22; and these elements are integrally formed. The contact avoiding section 7 is formed into an arc or arcuate shape and is capable of being elastically deformed when holding the jewel 14. Viewed from the direction looking into the table 16, the end 5 of the claw section 4 engaging with the table 16 is positioned at the outer side of the support seat 9 at the lower conical section of the jewel 14.
    Type: Grant
    Filed: September 10, 1997
    Date of Patent: November 2, 1999
    Assignee: Yama Co. Lt.
    Inventors: Kazusane Afuku, Akira Koitabashi