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Class Information
Number: 356/146
Name: Optics: measuring and testing > Angle measuring or angular axial alignment > Apex of angle at observing or detecting station > With plural images > Two or more lines of sight deflected
Description: Subject matter wherein the lines of sight from at least two objects are each deflected in the viewing instrument.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6141091 |
Surveying apparatus |
Oct. 31, 2000 |
| 5999252 |
Method for marking workpieces |
Dec. 7, 1999 |
| 5940172 |
Surveying apparatus |
Aug. 17, 1999 |
| 5929984 |
System and method for generating multiple parallel beams and planes |
Jul. 27, 1999 |
| 5872623 |
Massively parallel detection |
Feb. 16, 1999 |
| 5796488 |
Optical target alignment and technique |
Aug. 18, 1998 |
| 5557403 |
System and method for measuring crazing in a transparency |
Sep. 17, 1996 |
| 5161242 |
Automated repeating sextant (ARS) |
Nov. 3, 1992 |
| 4988193 |
Method and apparatus for measuring incident light angle relative to level |
Jan. 29, 1991 |
| 4908948 |
Precision optical square instrument |
Mar. 20, 1990 |
| 4462684 |
Single wheel celestial navigator |
Jul. 31, 1984 |
| 4449817 |
Celestial navigator |
May. 22, 1984 |
| 4413906 |
Passive optical rangefinder/sextant having search capability |
Nov. 8, 1983 |
| 4352556 |
Reflector for electrooptical distance measurement |
Oct. 5, 1982 |
| 4294541 |
Bi-periscopic instrument for use in determining terrestrial positions through celestial observation |
Oct. 13, 1981 |
| 4173413 |
Navigation instrument |
Nov. 6, 1979 |
| 4162124 |
Passive optical rangefinder-sextant |
Jul. 24, 1979 |
| D248018 |
Surveying instrument |
May. 30, 1978 |
| 4009960 |
Passive optical rangefinder |
Mar. 1, 1977 |
| 3992106 |
Error cancelling scanning optical angle measurement system |
Nov. 16, 1976 |
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