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Class Information
Number: 33/269
Name: Geometrical instruments > Straight-line light ray type > Celestial > Time computing
Description: Device including means whereby the time of day may be determined.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7197381 |
Navigational system and method utilizing sources of pulsed celestial radiation |
Mar. 27, 2007 |
| 6680877 |
Solar night splitter and event timer |
Jan. 20, 2004 |
| 6625085 |
Universal timepiece from which latitude and longitude can be determined |
Sep. 23, 2003 |
| 6612041 |
Diurnal solar event triggering mechanism |
Sep. 2, 2003 |
| 5701678 |
Space-time tracker |
Dec. 30, 1997 |
| 5269065 |
Compass including means for displaying constellation data |
Dec. 14, 1993 |
| 5253225 |
Compass watch of the mechanically or electromechanically driven type and bezel specifically intended for such a watch |
Oct. 12, 1993 |
| 5197199 |
Reflected spot sundial |
Mar. 30, 1993 |
| 5056232 |
Remote light source responsive visual time indicator |
Oct. 15, 1991 |
| 4945644 |
Hemispherical sundial with installation indicia |
Aug. 7, 1990 |
| 4899451 |
Solar compass and time indicator device |
Feb. 13, 1990 |
| 4512085 |
Method of and apparatus for telling time at night |
Apr. 23, 1985 |
| 4457296 |
Heating model |
Jul. 3, 1984 |
| 4346521 |
Modern sundial |
Aug. 31, 1982 |
| 4338727 |
Shadowless sundial |
Jul. 13, 1982 |
| 4136397 |
Astronomical timepiece |
Jan. 23, 1979 |
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