With A Cover Patents (Class 368/283)
  • Patent number: 4223527
    Abstract: A retaining spring for fixedly retaining a case band and a back cover of a wristwatch case, which retaining spring comprises a fixing portion secured to one of the case band and the back cover, a weakened or torsionable portion extending from the fixing portion, and an engaging portion connected to the fixing portion through the weakened or torsionable portion and engaging with the other one of said case band and said back cover.
    Type: Grant
    Filed: October 12, 1978
    Date of Patent: September 23, 1980
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Hidetaka Tutiya, Masahiko Waki