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Class Information
Number: 250/221
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Controlled by article, person, or animal
Description: Subject matter in which the optical path between the light source and the photocell is directly affected by an object which is movable with respect to, is not part of and is not continuously associated with the photocell device.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7459672 |
Motion sensor with LED aiming aid |
Dec. 2, 2008 |
| 7459671 |
Two-dimensional motion sensor |
Dec. 2, 2008 |
| 7459670 |
Proximity sensor based on projection of structured light |
Dec. 2, 2008 |
| 7459661 |
System for evaluating luminance and movement within an observation space, and method for controlling light sources within the observation space |
Dec. 2, 2008 |
| 7456382 |
Load sensor, method of detecting load and pedestrian protection system |
Nov. 25, 2008 |
| 7454935 |
Safety method and optoelectronic sensor |
Nov. 25, 2008 |
| 7452107 |
Rotary actuator with light guides and photo-sensor |
Nov. 18, 2008 |
| 7449671 |
Method and apparatus for reeling control having an electromagnetic radiation detection |
Nov. 11, 2008 |
| 7448242 |
Method for securing a machine tool and opto-electronic sensor for carrying out such a method |
Nov. 11, 2008 |
| 7447605 |
System and method for calibrating a vending apparatus |
Nov. 4, 2008 |
| 7446302 |
Optical vend-sensing system for control of vending machine |
Nov. 4, 2008 |
| 7446301 |
Safety mechanism comprising a height-adjustable holding device |
Nov. 4, 2008 |
| 7446300 |
Miniature electro-optic device having a conductive element for modifying the state of passage of light between inlet/outlet points and corresponding uses thereof |
Nov. 4, 2008 |
| 7442917 |
Method for using a single optical emitter/receiver pair for creating a light curtain using LCD+MEMS technology for beam deflection |
Oct. 28, 2008 |
| 7442916 |
Lift detection adapted for navigation on a transparent structure |
Oct. 28, 2008 |
| 7442915 |
Signal conditioning circuitry |
Oct. 28, 2008 |
| 7442914 |
System and method of determining a position of a radiation emitting element |
Oct. 28, 2008 |
| 7439484 |
Laser measurement apparatus using self-mixing effect |
Oct. 21, 2008 |
| 7437778 |
Automatic bathroom flushers |
Oct. 21, 2008 |
| 7435942 |
Signal processing method for optical sensors |
Oct. 14, 2008 |
| 7435941 |
Methods for measuring optical characteristics by differential diffractive scanning |
Oct. 14, 2008 |
| 7435940 |
System and a method of determining the position of a radiation emitting element |
Oct. 14, 2008 |
| 7429744 |
Reduced cost and complexity media recognition system with specular intensity light detector |
Sep. 30, 2008 |
| 7429726 |
Image displaying and capturing devices |
Sep. 30, 2008 |
| 7427748 |
Reflection type photoelectric switch |
Sep. 23, 2008 |
| 7423633 |
Apparatus for controlling the position of a screen pointer with low sensitivity to fixed pattern noise |
Sep. 9, 2008 |
| 7423256 |
Information handling system light sensor |
Sep. 9, 2008 |
| 7420542 |
Apparatus for capturing and analyzing light and method embodied therein |
Sep. 2, 2008 |
| 7420157 |
Optical encoder having wiring substrate light source, and/or photodetector covered by light transmitting material and its manufacturing method |
Sep. 2, 2008 |
| 7420155 |
Optical tactile sensor and method of reconstructing force vector distribution using the sensor |
Sep. 2, 2008 |
| 7417621 |
Optical mouse |
Aug. 26, 2008 |
| 7417217 |
Regressive reflection type photoelectric switch |
Aug. 26, 2008 |
| 7414236 |
Monitoring devices and intrusion surveillance devices |
Aug. 19, 2008 |
| 7414235 |
Handheld locating device with a sensor for detecting motion parameters |
Aug. 19, 2008 |
| 7412861 |
Device for monitoring an area of coverage on a work tool |
Aug. 19, 2008 |
| 7411175 |
Spotlight mounted motion detector |
Aug. 12, 2008 |
| 7411174 |
Sensor-controlled LED array apparatus and method |
Aug. 12, 2008 |
| 7408145 |
Light sensing instrument with modulated polychromatic source |
Aug. 5, 2008 |
| 7408144 |
Method for manufacturing semiconductor device including a multi-phase prism |
Aug. 5, 2008 |
| 7405390 |
Position detection system |
Jul. 29, 2008 |
| 7405389 |
Dense multi-axis array for motion sensing |
Jul. 29, 2008 |
| 7405388 |
Video centerscope for machine alignment |
Jul. 29, 2008 |
| 7402790 |
Fiber optic security system for sensing the intrusion of secured locations |
Jul. 22, 2008 |
| 7399955 |
Low profile optical navigation sensor |
Jul. 15, 2008 |
| 7399954 |
System and method for an optical navigation device configured to generate navigation information through an optically transparent layer and to have skating functionality |
Jul. 15, 2008 |
| 7399953 |
Light source control in optical pointing device |
Jul. 15, 2008 |
| 7398944 |
Hands-free electronic towel dispenser |
Jul. 15, 2008 |
| 7397022 |
Sensor arrangement to prevent reference light incident on side of photodiode |
Jul. 8, 2008 |
| 7394058 |
Touch screen with light-enhancing layer |
Jul. 1, 2008 |
| 7391007 |
Optoelectronic apparatus and method of operating the optoelectronic apparatus in order to detect an object |
Jun. 24, 2008 |
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