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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 509

Patents under this class:

Patent Number Title Of Patent Date Issued
8712485 Proximity sensor arrangement in a mobile device Apr. 29, 2014
8704153 Side mounting optical navigation module Apr. 22, 2014
8704152 Apparatus and circuit with a multi-directional arrangement of optical elements Apr. 22, 2014
8704151 Communication device sensor assembly Apr. 22, 2014
8692995 Optical system for projecting an IR or UV test signal with optical alignment of the projection axis in the visible spectral region Apr. 8, 2014
8692181 Medical imaging equipment and a measuring method for detecting the position of a conveying device of the medical imaging equipment Apr. 8, 2014
8690340 Combined image projection and capture system using on and off state positions of spatial light modulator Apr. 8, 2014
8686974 Touch-sensitive system and method for controlling the operation thereof Apr. 1, 2014
8680457 Motion detection system and associated methods having at least one LED of second set of LEDs to vary its voltage Mar. 25, 2014
8680456 Methods and apparatus for determination of parameters related to the movement of a coiled tubing string Mar. 25, 2014
8674286 Optical position detection device and apparatus with position detection function Mar. 18, 2014
8669514 Arrangement of sensors in a seed counting apparatus for a planter monitor Mar. 11, 2014
8664582 Display with an optical sensor Mar. 4, 2014
8664581 Input/output device and driving method thereof Mar. 4, 2014
8660707 Automatic cutoff apparatus Feb. 25, 2014
8658962 Optical switch with glowable activator portion Feb. 25, 2014
8653440 Sensor and housing in a replicating system to facilitate detection of objects using electromagnetic radiation Feb. 18, 2014
8653438 Optical inputting module of an electronic device for sensing movement of object and its light source unit Feb. 18, 2014
8648292 Safety photoelectric switch Feb. 11, 2014
8633462 Movement detection device for detecting movement of object in space range Jan. 21, 2014
8633433 Optical potentiometer having an optical element with optical property continuously varying along a moving direction and operating device Jan. 21, 2014
8629987 Optical-type position detecting device, hand apparatus, and touch panel Jan. 14, 2014
8629392 Device and method for preventing detection or speed detection by external laser measuring apparatus with a transmission surface oriented substantially transversely to the driving direction of Jan. 14, 2014
8624835 Interactive input system and illumination system therefor Jan. 7, 2014
8622243 Photochromic optically keyed dispenser Jan. 7, 2014
8622242 Taggant keying system for dispensing systems Jan. 7, 2014
8618468 Imaging module with folded illuminating and imaging paths Dec. 31, 2013
8618466 Position-measuring device having a first measuring standard and at least two multiturn code disks Dec. 31, 2013
8618464 Device and method for detecting broken glass in a conveyor sterilization tunnel Dec. 31, 2013
8614414 Proximity sensor Dec. 24, 2013
8606426 Alignment and anti-drift mechanism Dec. 10, 2013
8584345 Reprocessing of a physiological sensor Nov. 19, 2013
8582118 Optical detecting device, display device, and electronic equipment Nov. 12, 2013
8575537 Compact multi-direction proximity sensor device and method Nov. 5, 2013
8575536 Pixel array and touch sensing display panel having the same Nov. 5, 2013
8569680 Hyperacuity from pre-blurred sampling of a multi-aperture visual sensor Oct. 29, 2013
8569679 System and circuit including multiple photo detectors and at least one optical barrier Oct. 29, 2013
8563958 Inspection apparatus and inspection method Oct. 22, 2013
8558163 Optical navigation system having a filter-window to seal an enclosure thereof Oct. 15, 2013
8558162 Optical pointing device having a transparent housing element Oct. 15, 2013
8558161 Lens having multiple conic sections for LEDs and proximity sensors Oct. 15, 2013
8546741 Compact optical finger navigation system based on speckles with an optical element including an optical redirection surface Oct. 1, 2013
8546740 Evaluation of a difference signal between output signals of two receiving devices in a sensor apparatus Oct. 1, 2013
8537109 System and method for automatically adjusting light source drive current during optical navigation operation Sep. 17, 2013
8536510 Multi-optical axis photoelectric sensor Sep. 17, 2013
8536509 Scanner arrangement Sep. 17, 2013
8530823 Tool setting or analysis device with backup or repeated trigger signal for detecting a tool Sep. 10, 2013
8525777 Tracking motion of mouse on smooth surfaces Sep. 3, 2013
8525099 Temporal based motion sensor reporting Sep. 3, 2013
8525097 Wireless laser system for power transmission utilizing a gain medium between retroreflectors Sep. 3, 2013

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