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:
Jun. 15, 1976
Filed:
Dec. 28, 1973
Hachiro Kushida, Higashi-yamato, JA;
Tsuneji Takasugi, Iruma, JA;
Shinji Ikeda, Tokyo, JA;
Takashi Shiono, Chofu, JA;
Citizen Watch Co., Ltd., Tokyo, JA;
Abstract
The invention concerns a process for the manufacture of a decorative aluminum alloy product such as a watch case. In the first step, several aluminum sheets are united tightly into a stock by their overlapping and pressure-welding. The compacted stock is subjected to a forging step for agitating substantial part of the composite stock in its regularly laminated structure. Then, a watch case material is punched out from the composite stock which is further subjected to an anodically oxidizing step and a mirror finish step to provide the final product. The invention relates also the thus finished final product, having an attractive and contrasted flow design pattern on its exposed surface and in any section thereof.