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:
Dec. 16, 1997
Filed:
Dec. 01, 1995
Applicant:
Inventor:
Michael Bach, Bienne, CH;
Assignee:
Montres Rado Sa, Lengnau, CH;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; C04B / ;
U.S. Cl.
CPC ...
368286 ; 368280 ; 368316 ; 428698 ;
Abstract
The invention concerns a transparent scratchproof watch case closure element, characterized in that it is realized by sintering a pressed part or a injected part having a general shape similar to that of said closure element, said part being essentially formed of a powder or a mixture of powders of ceramic material and in that said closure element is transparent in the visible spectrum.