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Class Information
Number: 250/200
Name: Radiant energy > Photocells; circuits and apparatus
Description: Subject matter which includes a photocell.


Sub-classes under this class:

Class Number Class Name Patents
250/215 Combined with diverse-type device 114
250/554 Flame light source 139
250/239 Housings (in addition to cell casing) 954
250/550 Interference pattern analysis (e.g., spatial filtering or holography) 126
250/216 Optical or pre-photocell system 1,198
250/206 Photocell controlled circuit 148
250/201.1 Photocell controls its own optical systems 241
250/551 Signal isolator 665
250/552 Solid state light source 105
250/238 Temperature control of photocell 119
250/559.01 With circuit for evaluating a web, strand, strip, or sheet 139


Patents under this class:
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Patent Number Title Of Patent Date Issued
7592760 Lithographic apparatus and device manufacturing method Sep. 22, 2009
7560674 CMOS image sensor and method for manufacturing the same Jul. 14, 2009
7557384 Semiconductor light emitting device and semiconductor light emitting unit Jul. 7, 2009
7557365 Structures and methods for coupling energy from an electromagnetic wave Jul. 7, 2009
7554346 Test equipment for automated quality control of thin film solar modules Jun. 30, 2009
7538304 Reducing noise in an imager by sampling signals with a plurality of capacitances connected to an output line May. 26, 2009
7531775 Photometer for tracking a moving light source May. 12, 2009
7504957 Light sensor embedded on printed circuit board Mar. 17, 2009
7498950 Apparatus and method for using RFID to track use of a component within a device Mar. 3, 2009
7495207 Optical sensor, optical temperature-measuring device and measuring method using the optical sensor Feb. 24, 2009
7495199 MEMS radiometer Feb. 24, 2009
RE40410 Method and system for tracking attitude Jul. 1, 2008
7372009 Solid-state thermal neutron detector May. 13, 2008
7253426 Structures and methods for coupling energy from an electromagnetic wave Aug. 7, 2007
7248730 Certified paper discriminating apparatus Jul. 24, 2007
7242796 Certified paper and an apparatus for discriminating the genuineness thereof Jul. 10, 2007
7221448 Test cell for a noble gas polarizer May. 22, 2007
7208712 Structures and methods for coupling energy from an electromagnetic wave Apr. 24, 2007
7206044 Display and solar cell device Apr. 17, 2007
7202456 Gain stabilization apparatus and methods for spectral gamma ray measurement systems Apr. 10, 2007
7170606 Multi-way LED-based surface reflectance sensor and spectrophotometer Jan. 30, 2007
7151217 Organic photosensitive optoelectronic devices with transparent electrodes Dec. 19, 2006
7140574 Inertial position target measuring systems and methods Nov. 28, 2006
7109664 LED light with blaze-like radiance effect Sep. 19, 2006
7033655 Laminated glazing and means for its peripheral sealing Apr. 25, 2006
7025498 System and method of measuring thermal expansion Apr. 11, 2006
6982408 Photo-detecting method and photo-detecting device with varying modulation frequency Jan. 3, 2006
6970801 Control system or process for the automatic control of a moveable bucket wheel device Nov. 29, 2005
6969850 Microfluidic array devices and methods of manufacturing and uses thereof Nov. 29, 2005
6965105 Scanning system and method for scanning a plurality of samples Nov. 15, 2005
6930769 Optical sensor module tester Aug. 16, 2005
6928386 High-resolution optical encoder with phased-array photodetectors Aug. 9, 2005
6899849 Integrated sensor May. 31, 2005
6885007 Radiation detection apparatus Apr. 26, 2005
6865196 Laser spectroscopy using a master/slave architecture Mar. 8, 2005
6831260 Electron beam exposure apparatus, reduction projection system, and device manufacturing method Dec. 14, 2004
6774891 Transcription system Aug. 10, 2004
6670624 Ion implanter in-situ mass spectrometer Dec. 30, 2003
6646243 Nucleic acid reading and analysis system Nov. 11, 2003
6608293 Method of and apparatus for testing a photosensor Aug. 19, 2003
6602716 Method and device for referencing fluorescence intensity signals Aug. 5, 2003
6561693 Remote temperature sensing long wave length modulated focal plane array May. 13, 2003
6532075 System and method for utilizing a topology detector to capture visual information Mar. 11, 2003
6504526 Wireless pointing system Jan. 7, 2003
6489044 Process for fabricating polarized organic photonics devices, and resultant articles Dec. 3, 2002
6433270 Photoinduced molecular switches Aug. 13, 2002
6369796 Information input apparatus Apr. 9, 2002
6359211 Spectral sensitization of nanocrystalline solar cells Mar. 19, 2002
6352777 Organic photosensitive optoelectronic devices with transparent electrodes Mar. 5, 2002
6342706 Retroreflective detector Jan. 29, 2002

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