The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 2005
Filed:
Sep. 12, 2002
Kouji Fujii, Tokorozawa, JP;
Junji Satoh, Kawagoe, JP;
Hitoshi Uchida, Kodaira, JP;
Norio Hashimoto, Sayama, JP;
Ryo Fujita, Tokyo, JP;
Kouji Fujii, Tokorozawa, JP;
Junji Satoh, Kawagoe, JP;
Hitoshi Uchida, Kodaira, JP;
Norio Hashimoto, Sayama, JP;
Ryo Fujita, Tokyo, JP;
Citizen Watch Co. Ltd., Tokyo, JP;
Abstract
A wristwatch case () and a method of manufacturing the case, the wristwatch case comprising a wristwatch case body () made of titanium or stainless steel and a crown pipe () fixed to each other, wherein a stem hole () corresponding to the crown pipe () is formed in the wristwatch case body (), a small diameter part is formed in the crown pipe (), and a small diameter part corresponding to the a small diameter part of the crown pipe is formed in the stem hole (), the method comprising the step of fitting the crown pipe () into the stem hole () in the wristwatch case body () to form a solid phase diffusion joining part at a portion where the small diameter parts thereof are fitted closely to each other, and to form a brazed connection part at a portion other than that where the small diameter parts are fitted closely to each other, whereby a watch external part having excellent corrosion resistance and waterproof and a large number of design variations can be provided.