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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:

Class Number Class Name Patents
250/222.1 Inanimate article 452


Patents under this class:

Patent Number Title Of Patent Date Issued
7619206 Tactile switch for a domestic appliance having a controller causing a radiation emitter and an auxiliary radiation emitter to emit radiation for a duration of time Nov. 17, 2009
7616895 Safety edge with status and failure recognition Nov. 10, 2009
7615734 Image capture device Nov. 10, 2009
7615733 Optical navigation apparatus and method for making the apparatus Nov. 10, 2009
7612325 Electrical sensor for monitoring degradation of products from environmental stressors Nov. 3, 2009
7612324 Distributed display composed of active fiducials Nov. 3, 2009
7605360 Power supply system for green laser indicating pen Oct. 20, 2009
7602286 Tamper detector for a security sensor Oct. 13, 2009
7601945 Position detecting device for detecting the absolute value of a position of a movable member which has a sensor mounted thereon Oct. 13, 2009
7598484 Photoelectric sensor for securing the safety of a work area Oct. 6, 2009
7595479 Tilt detector and tilt detecting method for the same Sep. 29, 2009
7595478 Method and device for processing optical signals in computer mouse Sep. 29, 2009
7590345 Optoelectronic protection device Sep. 15, 2009
7589311 Optoelectronic sensor and method for detecting objects with polarized light Sep. 15, 2009
7580361 Network system, information processor and electronic apparatus Aug. 25, 2009
7576312 Positioning apparatus for a printer Aug. 18, 2009
7576311 Optical detector having a sensing element, a lens and a frustum coupled to the lens Aug. 18, 2009
7573021 Method and apparatus for multiple scan rate swept wavelength laser-based optical sensor interrogation system with optical path length measurement capability Aug. 11, 2009
7570793 Correction method for data of a plurality of optoelectronic sensors Aug. 4, 2009
7569843 Method for processing receiver signal and optical sensor Aug. 4, 2009
7569806 Moving object detection photointerrupter having a determination of passing of the moving object based on its passing direction and the detection information of the next moving object and elect Aug. 4, 2009
7566862 Device, method, and program for responding based on change in wavelength of light Jul. 28, 2009
7566861 Detection device controlled by driving speed and driving direction Jul. 28, 2009
7564015 System and method for processing and displaying light energy Jul. 21, 2009
7557935 Optical coordinate input device comprising few elements Jul. 7, 2009
7557338 Electronic device with integrated optical navigation module and microlens array therefore Jul. 7, 2009
7557332 Driver circuit for driving a light source of an optical pointing device Jul. 7, 2009
7554076 Sensor system with modular optical transceivers Jun. 30, 2009
7551428 Automatic power control Jun. 23, 2009
7550708 Photoelectric sensor and emitting device for photoelectric sensor Jun. 23, 2009
7550707 Biometrics authentication system with authentication based upon multiple layers Jun. 23, 2009
7548316 System and method for lead edge and trail edge sheet constraint and curl sensing Jun. 16, 2009
7547866 Laser irradiation method and method for manufacturing semiconductor device including an autofocusing mechanism using the same Jun. 16, 2009
7544924 Directional input device with a light directing shaft Jun. 9, 2009
7541566 Transmitter, receiver, and system with relative position detecting functionality between transmitters and receivers Jun. 2, 2009
7538311 Image sensor and digital camera May. 26, 2009
7538310 Laser beam irradiation device with error position detection May. 26, 2009
7534992 Contactless connector for data transmission including rotating and fixed light elements May. 19, 2009
7534989 Detecting device and laminated body manufacturing apparatus employing such detecting device May. 19, 2009
7534988 Method and system for optical tracking of a pointing object May. 19, 2009
7531788 Photosensor comprising light receiving elements and filters, and a corresponding target detection method and display panel May. 12, 2009
7531787 Access control device May. 12, 2009
7528355 System and method for processing and displaying light energy May. 5, 2009
7525084 Input device, electronic apparatus and method for controlling input device Apr. 28, 2009
7525082 System and method for performing optical navigation on glass-like navigation surfaces Apr. 28, 2009
7523885 Hands-free electronic towel dispenser with power saving feature Apr. 28, 2009
7521668 Optical audio microphone arrangement including a Michelson type interferometer for providing a phase difference between different parts of light beams Apr. 21, 2009
7521665 Sensor system, sensor element, and method with a light sensor and an electrical sensor for monitoring a closing mechanism Apr. 21, 2009
7521664 Laser direction detection Apr. 21, 2009
7521662 Portable handheld artificial light detector Apr. 21, 2009



 
 
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