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Class Information
Number: 338/15
Name: Electrical resistors > Resistance value responsive to a condition > Photoconductive (e.g., light sensitive)
Description: Subject matter wherein the resistor is formed of a material whose resistance value changes materially upon the application of light, infrared radiation, or ultraviolet radiation to the resistor, or upon a change in the intensity of this radiation applied to the resistor together with any structure which facilitates the application of light or ultra violet or infrared radiation to the resistor.










Sub-classes under this class:

Class Number Class Name Patents
338/18 Infrared radiation 60
338/17 Plural resistance elements (e.g., mosaic) 20
338/19 With transparent housing 4
338/16 With vibration control 1


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8563930 System and method of modulating electrical signals using photoconductive wide bandgap semiconductors as variable resistors Oct. 22, 2013
8466425 Chalcogenide glass ionizing radiation sensor Jun. 18, 2013
7667567 High precision voltage measuring passive network Feb. 23, 2010
7605013 Photo-detector and related methods Oct. 20, 2009
7535333 Method for monitoring the contact resistance of a wiper May. 19, 2009
6756585 Process for manufacturing a housing for sensor elements, sensor and use thereof Jun. 29, 2004
6743988 Optically controlled switches Jun. 1, 2004
6639084 Chemically amplified resist, polymer for the chemically amplified resist, monomer for the polymer and method for transferring pattern to chemically amplified resist layer Oct. 28, 2003
6617958 Optical potentiometer Sep. 9, 2003
6292089 Structures for temperature sensors and infrared detectors Sep. 18, 2001
6144285 Thermal sensor and method of making same Nov. 7, 2000
6094127 Infrared bolometer and method for manufacturing same Jul. 25, 2000
5966590 Method for manufacturing thermal-type infrared sensor Oct. 12, 1999
5939971 Infrared bolometer Aug. 17, 1999
5900799 High responsivity thermochromic infrared detector May. 4, 1999
RE36136 Thermal sensor Mar. 9, 1999
5818322 Silicon photosensitive element Oct. 6, 1998
5798684 Thin-film temperature sensor Aug. 25, 1998
5629665 Conducting-polymer bolometer May. 13, 1997
5581232 Ultrasonic wave reception apparatus and obstacle detection apparatus Dec. 3, 1996
5343186 Variable resistor having the capacity to produce a fader start signal output Aug. 30, 1994
5332918 Ultra-high-speed photoconductive devices using semi-insulating layers Jul. 26, 1994
5309132 Technique for trimming photoresistors and trimmed photoresistors May. 3, 1994
5220188 Integrated micromechanical sensor element Jun. 15, 1993
5220189 Micromechanical thermoelectric sensor element Jun. 15, 1993
5192631 Variable electroconductivity material Mar. 9, 1993
5130690 Photoconductor Jul. 14, 1992
5097121 Beveled edge impurity band conduction detector Mar. 17, 1992
5091765 Photoconductive cell with zinc oxide tetrapod crystals Feb. 25, 1992
4997593 Variable electroconductivity material Mar. 5, 1991
4973935 Infrared detector Nov. 27, 1990
4961096 Semiconductor image position sensitive device with primary and intermediate electrodes Oct. 2, 1990
4924285 Monolithic multichannel detector amplifier arrays and circuit channels May. 8, 1990
4839510 Optical sensor including shortcircuit protection having notched electrode regions Jun. 13, 1989
4835507 Photosensor array for image processing apparatus May. 30, 1989
4821091 Polysilicon photoconductor for integrated circuits Apr. 11, 1989
4818174 Compact robot arm member relative movement sensor Apr. 4, 1989
4818173 Robot arm member relative movement sensing apparatus Apr. 4, 1989
4796000 Optical potentiometer Jan. 3, 1989
4788522 Image sensing Nov. 29, 1988
4775435 Method of manufacturing a liquid level probe Oct. 4, 1988
4727349 Depleted channel photoconductor Feb. 23, 1988
4724338 Generation of narrow-band, delayed electrical pulses Feb. 9, 1988
4636794 Photo-conductive element operative in the microwave region and a light-steerable antenna array incorporating the photo-conductive element Jan. 13, 1987
4633286 Multiple gap optically activated switch Dec. 30, 1986
4626883 Textured crystal picosecond photoresponsive element Dec. 2, 1986
4553928 Switching device for photoflash unit Nov. 19, 1985
4523090 Light controlled fader Jun. 11, 1985
4494132 Semiconductor opto-electronic switch Jan. 15, 1985
4490709 InP:Fe Photoconducting device Dec. 25, 1984

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