Ricoh Research Institute of General Electronics Co., Ltd.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 12350
 
  
 
H01S DEVICES USING STIMULATED EMISSION290
 
  
 
B41J TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS 1101
 
  
 
G08C TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS 154
 
  
 
G09G ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION 1150
 
  
 
H01J ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS 1127

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5684523 Optical line printhead and an LED chip used thereforJun 06, 95Nov 04, 97[B41J]
5545925 Semiconductor device having a metallic silicide layer for improved operational ratesJun 23, 94Aug 13, 96[H01L]
5521402 Semiconductor optical functional element of loading resistor integrated typeMar 20, 95May 28, 96[H01L]
5448113 Micro metal-wiring structure having stress induced migration resistanceDec 02, 94Sep 05, 95[H01L]
5444193 Pen input deviceSep 20, 93Aug 22, 95[G08C, G09G]
5428227 Semiconductor light emitting elementMar 16, 94Jun 27, 95[H01L, H01S]
5408113 High sensitivity improved photoelectric imaging device with a high signal to noise ratioJun 28, 93Apr 18, 95[H01L]
5362673 Method of manufacturing a semiconductor light emitting deviceDec 07, 93Nov 08, 94[H01L]
5357123 Light emitting diode array with dovetailMay 03, 93Oct 18, 94[H01L]
5316960 C-MOS thin film transistor device manufacturing methodJun 17, 93May 31, 94[H01L]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5937327 Method for improving wiring contact in semiconductor devicesExpiredFeb 25, 97Aug 10, 99[H01L]
5403673 Functional thin film memberExpiredMar 09, 92Apr 04, 95[B32B]
5299031 Image sensor and optical reading unit using the sameExpiredSep 07, 90Mar 29, 94[H04N]
5264849 Optical A/D conversion using asymmetrical-neural-networksExpiredJul 23, 92Nov 23, 93[H03M]
5260586 Optical exclusive-or elementExpiredNov 13, 92Nov 09, 93[H01L]
5155567 Amorphous photoconductive material and photosensor employing the photoconductive materialExpiredDec 28, 90Oct 13, 92[H01L]
5153750 Image reading apparatus having a contact type image sensor deviceExpiredMay 18, 90Oct 06, 92[H04N]
5146082 Image detecting unit having emitting means and light receiving means and method for arranging the light emitting means and the light receiving meansExpiredOct 29, 90Sep 08, 92[H01J]
5144458 Total contact type image sensorExpiredMay 07, 90Sep 01, 92[H04N]
5140397 Amorphous silicon photoelectric deviceExpiredFeb 10, 89Aug 18, 92[H01L]
5123975 Single crystal silicon substrateExpiredMar 14, 90Jun 23, 92[H01L]
5124543 Light emitting element, image sensor and light receiving element with linearly varying waveguide indexExpiredAug 08, 90Jun 23, 92[H01J]
5117477 Optical functioning element using a transparent substrate with matching lattice constantExpiredJan 25, 91May 26, 92[H01L, G02B]
5108843 Thin film semiconductor and process for producing the sameExpiredNov 27, 89Apr 28, 92[B32B]
5101246 Photo-functional deviceExpiredDec 04, 89Mar 31, 92[H01L]
5093697 Semiconductor light emitting elementExpiredOct 26, 90Mar 03, 92[H01L]
5091757 Semiconductor light emitting array with particular surfacesExpiredSep 06, 90Feb 25, 92[H01L]
5061974 Semiconductor light-emitting device of array typeExpiredDec 22, 89Oct 29, 91[H01L]
5060041 Amorphous silicon photosensorExpiredNov 14, 88Oct 22, 91[H01L]
5053844 Amorphous silicon photosensorExpiredNov 01, 90Oct 01, 91[H01L]

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