| |
 |
|
Class Information
Number: 356/148
Name: Optics: measuring and testing > Angle measuring or angular axial alignment > Apex of angle at observing or detecting station > Artificial reference
Description: Subject matter including, for the purpose of establishing a reference line or plane from which the angle can be measured, means which tends to maintain its orientation in space irrespective of changes in the orientation of the supporting structure for this means.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7487596 |
Laser line projected on an edge of a surface |
Feb. 10, 2009 |
| 6724471 |
Arrangement for the vertical orientation of a geodetic instrument |
Apr. 20, 2004 |
| 6625895 |
Servo-controlled automatic level and plumb tool |
Sep. 30, 2003 |
| 6292258 |
Laser receiver with out-of-plumb indication and compensation |
Sep. 18, 2001 |
| 6177987 |
Laser level |
Jan. 23, 2001 |
| 6141147 |
Optical unit for image projection and tool incorporating same |
Oct. 31, 2000 |
| 6104480 |
Angle measuring device |
Aug. 15, 2000 |
| 6104479 |
Laser system |
Aug. 15, 2000 |
| 6073354 |
Plumb laser beam generator with floating telescope |
Jun. 13, 2000 |
| 6057916 |
Automatic inclination corrector and inclination sensor using an automatic inclination corrector |
May. 2, 2000 |
| 5847820 |
Laser apparatus for sensing rotational orientation and levelness |
Dec. 8, 1998 |
| 5684579 |
Automatic tilt angle compensator |
Nov. 4, 1997 |
| 5680208 |
Gravity oriented laser scanner |
Oct. 21, 1997 |
| 5513001 |
Tilt angle automatic compensator in all directions |
Apr. 30, 1996 |
| 5392112 |
Inclination angle metering apparatus |
Feb. 21, 1995 |
| 5126561 |
Angle displacement detector for optical image stabilization device |
Jun. 30, 1992 |
| 5112126 |
Apparatuses and methods for making geophysical measurements useful in determining the deflection of the vertical |
May. 12, 1992 |
| 4988193 |
Method and apparatus for measuring incident light angle relative to level |
Jan. 29, 1991 |
| 4869590 |
Geodetic instrument |
Sep. 26, 1989 |
| 4811062 |
Method for aligning first and second objects relative to each other and apparatus for practicing this method |
Mar. 7, 1989 |
| 4681438 |
Automatic compensator for compensating collimation error due to two-directional inclination in surveying instruments |
Jul. 21, 1987 |
| 4629321 |
Grade setting and calibration arrangement for laser beam projection device |
Dec. 16, 1986 |
| 4291978 |
Apparatus for automatically determining the position at which a beam of light impinges on a target |
Sep. 29, 1981 |
| 4172662 |
Eyepiece for measurement of lengths and angles by a microscope |
Oct. 30, 1979 |
| 4171907 |
Electro-optic distance measuring device |
Oct. 23, 1979 |
| 4136962 |
Apparatus for orienting and maintaining the orientation of construction equipment |
Jan. 30, 1979 |
| 4135823 |
Optical assembly for generating light beams accurately at right-angles to each other |
Jan. 23, 1979 |
| 4119382 |
Self-leveling construction alignment laser |
Oct. 10, 1978 |
| 4043679 |
Self-leveling construction alignment laser |
Aug. 23, 1977 |
| 4040752 |
Laser unit with a laser beam automatically aligned to the vertical direction |
Aug. 9, 1977 |
| 4021662 |
Laser target simulator |
May. 3, 1977 |
|
|
|
