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Class Information
Number: 33/378
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Level or plumb, terrestrial gravitation responsive > Liquid type, upper surface utilizing > Float or piston
Description: Device wherein an element is supported by the liquid, the element serving to indicate or to control an indicator.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5509209 |
Laser plumbing device |
Apr. 23, 1996 |
| 5467532 |
Hedge trimmer aid |
Nov. 21, 1995 |
| 5184406 |
Projected light plumb device |
Feb. 9, 1993 |
| 5111188 |
Electronic fluid-level sensor with three state indicator |
May. 5, 1992 |
| 5088204 |
Level sensing unit and a level indicating device based thereon |
Feb. 18, 1992 |
| 5031081 |
Headlamp for power vehicle |
Jul. 9, 1991 |
| 4943158 |
Sensor controlled leveling device |
Jul. 24, 1990 |
| 4914823 |
Float biased level apparatus |
Apr. 10, 1990 |
| 4897824 |
Sonar systems |
Jan. 30, 1990 |
| 4876799 |
Level sensing unit and a level indicating device thereon |
Oct. 31, 1989 |
| 4791730 |
Direction sensing device |
Dec. 20, 1988 |
| 4685218 |
Level sensing unit and a level indicating device based thereon |
Aug. 11, 1987 |
| 4590681 |
Level based on moire effect with ambient light |
May. 27, 1986 |
| 4543730 |
Liquid level indicator for a tilted container |
Oct. 1, 1985 |
| 4488431 |
Wind speed and direction indicator and electric current generating means |
Dec. 18, 1984 |
| 4471535 |
Four way utility level |
Sep. 18, 1984 |
| 4435907 |
Machine body inclination detector device |
Mar. 13, 1984 |
| 4432284 |
Mobile ballast cleaning machine |
Feb. 21, 1984 |
| 4384410 |
Precision hydrostatic levelling system |
May. 24, 1983 |
| 4096638 |
Pendulum |
Jun. 27, 1978 |
| 4024823 |
Automatic blade angle controller system |
May. 24, 1977 |
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