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Class Information
Number: 33/366.16
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Level or plumb, terrestrial gravitation responsive > Electrically actuated signal or indicator > Fluent sensor > Having light or radiant energy detecting circuit control element
Description: Subject matter including a circuit control element and wherein the control element is responsive to radiation incident thereon after passage through some portion of the fluent material.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7389592 |
Lean detector of vehicle |
Jun. 24, 2008 |
| 7350305 |
Laser activated audible signal emitting leveler |
Apr. 1, 2008 |
| 7325321 |
Method and device for monitoring the alignment of a measuring instrument, and measuring instrument |
Feb. 5, 2008 |
| 7299557 |
Tilt sensor |
Nov. 27, 2007 |
| 6647634 |
Reliably sensing bubble leveling means |
Nov. 18, 2003 |
| 6649927 |
Tilt detecting device |
Nov. 18, 2003 |
| 6490802 |
Orientation sensor |
Dec. 10, 2002 |
| 6449858 |
Angle sensor |
Sep. 17, 2002 |
| 6343422 |
Tilt angel measuring device |
Feb. 5, 2002 |
| 6320653 |
Multiple-axis inclinometer for measuring inclinations and changes in inclination |
Nov. 20, 2001 |
| 6057916 |
Automatic inclination corrector and inclination sensor using an automatic inclination corrector |
May. 2, 2000 |
| 6037874 |
Electronic level with laser inclination indicator |
Mar. 14, 2000 |
| 5893215 |
Inclination sensor and surveying instrument using the same |
Apr. 13, 1999 |
| 5847824 |
Automatic angle compensator |
Dec. 8, 1998 |
| 5794355 |
Rotationally actuated position sensor |
Aug. 18, 1998 |
| 5513001 |
Tilt angle automatic compensator in all directions |
Apr. 30, 1996 |
| 5479715 |
Electronic level displaying inclination using a multi-segment fan-like display |
Jan. 2, 1996 |
| 5450676 |
Slope angle and level indicator apparatus |
Sep. 19, 1995 |
| 5425179 |
Optical sensor for measuring inclination angles |
Jun. 20, 1995 |
| 5371951 |
Two-axis inclinometer |
Dec. 13, 1994 |
| 5322441 |
Method and apparatus for providing a portable visual display |
Jun. 21, 1994 |
| 5317810 |
Clinometer |
Jun. 7, 1994 |
| 5218771 |
Orientation sensing apparatus |
Jun. 15, 1993 |
| 5177872 |
Method and apparatus for monitoring physical positioning of a user |
Jan. 12, 1993 |
| 5148018 |
Laser beam levelling device |
Sep. 15, 1992 |
| 5111039 |
Photoelectric vertical sensor with pressure compensation means |
May. 5, 1992 |
| 5101570 |
Inclination angle detector |
Apr. 7, 1992 |
| 5025567 |
Illuminated spirit level using fiber optic devices |
Jun. 25, 1991 |
| 4993162 |
Apparatus for measuring inclinations of a component |
Feb. 19, 1991 |
| 4956922 |
Bubble inclination gauge including a central shield for light-emitting and light-detecting means |
Sep. 18, 1990 |
| 4861981 |
Optoelectronic theodolite sensor |
Aug. 29, 1989 |
| 4666299 |
Inclination measuring apparatus having a prism with associated liquid container |
May. 19, 1987 |
| 4625423 |
Electronic inclination gauge |
Dec. 2, 1986 |
| 4592147 |
Electrically actuated angular orientation indicating device |
Jun. 3, 1986 |
| 4590680 |
Electronic inclination sensing device |
May. 27, 1986 |
| 4496836 |
Device for identifying a circumferential position |
Jan. 29, 1985 |
| 4484393 |
Illuminated spirit level |
Nov. 27, 1984 |
| 4450353 |
Tilt detector with pyramidal surface |
May. 22, 1984 |
| 4332090 |
Directional two axis optical inclinometer |
Jun. 1, 1982 |
| 4307516 |
Directional two-axis differential optical inclinometer |
Dec. 29, 1981 |
| 4182046 |
Electronic level and protractor |
Jan. 8, 1980 |
| 4159422 |
Temperature stable displacement sensor with fine resolution |
Jun. 26, 1979 |
| 4154000 |
Remote level sensing instrument |
May. 15, 1979 |
| 4028260 |
Liquid for a feeler element for the electrical measurement of inclinations |
Jun. 7, 1977 |
| 4003134 |
Automatic lighted level and angle finder |
Jan. 18, 1977 |
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