| Patents for G04B 9 - Supervision of the state of winding, e.g. indicating the amount of winding (206) | |
|---|---|
| 07/1997 | |
| 07/24/1997 | DE19649362A1 Indicator for mechanical wristwatch showing remaining main spring power |
| 04/1997 | |
| 04/09/1997 | CN1147100A Timepiece having power reserve indicator |
| 03/1997 | |
| 03/12/1997 | EP0762243A1 Timepiece with power-reserve indication |
| 11/1993 | |
| 11/03/1993 | EP0568499A1 Device for displaying the power-reserve of a watch |
| 08/1992 | |
| 08/05/1992 | CN1017753B Big world clock |
| 03/1989 | |
| 03/29/1989 | CN1032082A Big world clock |