Patents by Inventor Yuji YAHARA

Yuji YAHARA 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: 11921464
    Abstract: A timepiece according to an embodiment enables a crown to be rotated even when it is locked, using a structure that does not cause constraints of design. The timepiece includes an outer case having a movement therein, the outer case having a crown hole through a portion thereof, an engagement member connected to the outer case, and a crown. The crown includes a shaft part inserted into the crown hole and connected to the movement, an operation part holding the shaft part movably along an axial direction of the shaft part and enabling the shaft part to rotate in a circumferential direction, and an engagement part disposed between the engagement member and the operation part and restricting movement of the operation part in the axial direction when engaged with the engagement member, the engagement part rotatably holding the operation part whether or not engaged with the engagement member.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: March 5, 2024
    Assignee: CITIZEN WATCH CO., LTD.
    Inventor: Yuji Yahara
  • Patent number: 11880168
    Abstract: A timepiece according to an embodiment enables a crown to be rotated even when it is locked, using a structure that does not cause constraints of design. The timepiece includes an outer case having a movement therein, the outer case having a crown hole through a portion thereof, an engagement member connected to the outer case, and a crown. The crown includes a shaft part inserted into the crown hole and connected to the movement, an operation part holding the shaft part movably along an axial direction of the shaft part and enabling the shaft part to rotate in a circumferential direction, and an engagement part disposed between the engagement member and the operation part and restricting movement of the operation part in the axial direction when engaged with the engagement member, the engagement part rotatably holding the operation part whether or not engaged with the engagement member.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: January 23, 2024
    Assignee: CITIZEN WATCH CO., LTD.
    Inventor: Yuji Yahara
  • Publication number: 20220214649
    Abstract: A timepiece according to an embodiment enables a crown to be rotated even when it is locked, using a structure that does not cause constraints of design. The timepiece includes an outer case having a movement therein, the outer case having a crown hole through a portion thereof, an engagement member connected to the outer case, and a crown. The crown includes a shaft part inserted into the crown hole and connected to the movement, an operation part holding the shaft part movably along an axial direction of the shaft part and enabling the shaft part to rotate in a circumferential direction, and an engagement part disposed between the engagement member and the operation part and restricting movement of the operation part in the axial direction when engaged with the engagement member, the engagement part rotatably holding the operation part whether or not engaged with the engagement member.
    Type: Application
    Filed: March 30, 2020
    Publication date: July 7, 2022
    Inventor: Yuji YAHARA