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Class Information
Number: 33/366.23
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Level or plumb, terrestrial gravitation responsive > Electrically actuated signal or indicator > 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 |
| 7322118 |
Non-contact electronic level |
Jan. 29, 2008 |
| 7161138 |
Electrical product and tilting control device thereof |
Jan. 9, 2007 |
| 6987460 |
Orientation device |
Jan. 17, 2006 |
| 6723979 |
Roll arming sensor |
Apr. 20, 2004 |
| 6708416 |
Inclination sensor |
Mar. 23, 2004 |
| 6664534 |
Tilt sensing device and method for its operation |
Dec. 16, 2003 |
| 6647634 |
Reliably sensing bubble leveling means |
Nov. 18, 2003 |
| 6649927 |
Tilt detecting device |
Nov. 18, 2003 |
| 6343422 |
Tilt angel measuring device |
Feb. 5, 2002 |
| 6320653 |
Multiple-axis inclinometer for measuring inclinations and changes in inclination |
Nov. 20, 2001 |
| 6248989 |
Tilt detecting device |
Jun. 19, 2001 |
| 6202488 |
Vehicle rollover sensor |
Mar. 20, 2001 |
| 6037874 |
Electronic level with laser inclination indicator |
Mar. 14, 2000 |
| 5953116 |
Tilt detecting device |
Sep. 14, 1999 |
| 5392112 |
Inclination angle metering apparatus |
Feb. 21, 1995 |
| 5373153 |
Optoelectronic tilt detector having tapered floors extending in same direction |
Dec. 13, 1994 |
| 5365671 |
Inclinometer |
Nov. 22, 1994 |
| 5210954 |
Clinometer |
May. 18, 1993 |
| 4972595 |
Inclination sensor |
Nov. 27, 1990 |
| 4947692 |
Apparatus for detecting positional changes in relation to a vertical reference direction in buildings or in building subsoil |
Aug. 14, 1990 |
| 4942668 |
Digital inclinometer |
Jul. 24, 1990 |
| 4943158 |
Sensor controlled leveling device |
Jul. 24, 1990 |
| 4922620 |
Device for determining the inclination of a plane with respect to theoretical horizontal plane |
May. 8, 1990 |
| 4841136 |
Sighting apparatus with automatic correction mechanism |
Jun. 20, 1989 |
| 4827624 |
Electronic level |
May. 9, 1989 |
| 4812654 |
Two-axis quartz fiber passive tilt meter |
Mar. 14, 1989 |
| 4798087 |
Inclination detector |
Jan. 17, 1989 |
| 4760649 |
Travel trailer level indicator |
Aug. 2, 1988 |
| 4700479 |
Cant angle sensor assembly |
Oct. 20, 1987 |
| 4694584 |
Reduced volume digital inclinometer |
Sep. 22, 1987 |
| 4584778 |
Angle change detector |
Apr. 29, 1986 |
| 4571844 |
Angle change detector |
Feb. 25, 1986 |
| 4565010 |
Electronic signaling level |
Jan. 21, 1986 |
| 4561188 |
Grade and slope attitude gyroscopic driven indicator for heavy earth moving equipment |
Dec. 31, 1985 |
| 4507965 |
Detector for determining both forces on and positions of a host device |
Apr. 2, 1985 |
| 4492029 |
Inclinometer |
Jan. 8, 1985 |
| 4370813 |
Automatic self-leveling instrument mount |
Feb. 1, 1983 |
| 4253242 |
Digital angle indicator |
Mar. 3, 1981 |
| 4164077 |
Level indicating devices |
Aug. 14, 1979 |
| 4159577 |
Device for indicating a horizontal direction and one or more angle sectors about said direction |
Jul. 3, 1979 |
| 4136955 |
Apparatus for correcting theodolites |
Jan. 30, 1979 |
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