专利名称：Annual calendar mechanism for a timepiece发明人：RUEFENACHT, CHRISTIAN申请号：EP04028561.1申请日：20041202公开号：EP1666991B1公开日：20110601
摘要：The mechanism has an intermediate wheel connecting an annual wheel (7) to astage of a date ring (4), at the end of each month. The wheel (7) has twice of teeth (30)than arc months in a year and a wheel (40) meshed to it. The wheel (7) has a wheel (50)fixed onto and arranged coaxially to the wheel (40). The latter wheel is meshed at theend of each month, with a snug arranged inside the date ring stage.
申请人：ETA SA MANUFACTURE HORLOGERE SUISSE,ETA SA MFT HORLOGERESUISSE,ETA SA MANUFACTURE HORLOGERE SUISSE
地址：CH
国籍：CH
代理机构：Ravenel, Thierry Gérard Louis
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