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Class Information
Number: 33/348.2
Name: Geometrical instruments > Indicator of direction of force traversing natural media > With viewing aid (i.e., illuminator or illumination director) > Spirit level electric illuminator
Description: Subject matter wherein the illuminator is electrically powered and the device is a spirit level.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6877242 |
Illuminated caliper instrument |
Apr. 12, 2005 |
| 6851200 |
Reflecting lighted level |
Feb. 8, 2005 |
| 6748665 |
Illuminated spirit level |
Jun. 15, 2004 |
| 6115928 |
Fiber optic position indicator using liquid/air light transmission |
Sep. 12, 2000 |
| 5761818 |
Digital inclinometer |
Jun. 9, 1998 |
| 5361503 |
Accessory for carpenter levels |
Nov. 8, 1994 |
| 5199177 |
Level |
Apr. 6, 1993 |
| 5180221 |
Apparatus and method for illuminating a liquid filled container |
Jan. 19, 1993 |
| 5075978 |
Illuminated spirit level |
Dec. 31, 1991 |
| 5025567 |
Illuminated spirit level using fiber optic devices |
Jun. 25, 1991 |
| 5020232 |
Illuminated level |
Jun. 4, 1991 |
| 4956922 |
Bubble inclination gauge including a central shield for light-emitting and light-detecting means |
Sep. 18, 1990 |
| 4912854 |
Cross vial liquid bubble illuminated level |
Apr. 3, 1990 |
| 4876798 |
Level with illuminated bubble vials |
Oct. 31, 1989 |
| 4833788 |
Univeral level light adapter |
May. 30, 1989 |
| 4745687 |
Level indication device and method for providing a level indication of up to three degrees accuracy |
May. 24, 1988 |
| 4484393 |
Illuminated spirit level |
Nov. 27, 1984 |
| 4407075 |
Illuminated spirit vial and level |
Oct. 4, 1983 |
| 4392184 |
Illuminating method and apparatus for carpenter's or mechanic's levels |
Jul. 5, 1983 |
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