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Class Information
Number: 33/271
Name: Geometrical instruments > Straight-line light ray type > Celestial > Time computing > Including gnomonic indicator (e.g., sundial, etc.) > And compass
Description: Device including means responsive to an external magnetic field, usually that of the earth, for indicating direction.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6871407 |
Equatorial sundial with simple time and date interpretation |
Mar. 29, 2005 |
| 5596551 |
Watch comprising an arrangement for detecting the direction of the terrestrial magnetic north |
Jan. 21, 1997 |
| 5590093 |
Digital sundial |
Dec. 31, 1996 |
| 5550794 |
Watch including an arrangement indicating the magnetic north |
Aug. 27, 1996 |
| 5459931 |
Direction indicator |
Oct. 24, 1995 |
| 5425178 |
Solar compass |
Jun. 20, 1995 |
| 5276972 |
Satellite locator |
Jan. 11, 1994 |
| 5265345 |
Universal sun-clock |
Nov. 30, 1993 |
| 5253225 |
Compass watch of the mechanically or electromechanically driven type and bezel specifically intended for such a watch |
Oct. 12, 1993 |
| 4938697 |
Multi-dimensional astral position finding device |
Jul. 3, 1990 |
| 4899451 |
Solar compass and time indicator device |
Feb. 13, 1990 |
| 4487511 |
Watch for the space orientation in addition to the time orientation |
Dec. 11, 1984 |
| 4237611 |
Solar shadowscope |
Dec. 9, 1980 |
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