Ricoh Company, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 3202
 
  
 
H04N PICTORIAL COMMUNICATION, e.g. TELEVISION 2240
 
  
 
G02F DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS 1132
 
  
 
G11B INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER 1137
 
  
 
G11C STATIC STORES 1150
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 1361
 
  
 
H01S DEVICES USING STIMULATED EMISSION191
 
  
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 1284

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8045043 Optical module and imaging deviceDec 27, 06Oct 25, 11[H04N]
8006083 Image forming apparatus, authentication method, and recording mediumJul 18, 07Aug 23, 11[H04L, G06F]
7088484 Optical scanning method and system capable of performing high speed scanning and high resolution, and image forming apparatus having the optical scanning systemMar 25, 03Aug 08, 06[G02B]
6944106 Information recording apparatus for controlling recording power of a recording mediumSep 10, 02Sep 13, 05[G11B]
6175439 Rotary body for a polygonal mirror type scanner and method of machining the sameJun 11, 99Jan 16, 01[G02B]
D418862 Toner cartridgeSep 28, 98Jan 11, 00[1603]
5946334 Semiconductor laser control systemMar 27, 97Aug 31, 99[H01S]
5805324 Optical scannerNov 20, 95Sep 08, 98[G02B]
5652443 Sensor having a micro-bridge heaterAug 10, 95Jul 29, 97[H01L]
5408344 Reflection type liquid crystal display with selective reflecting meansJan 11, 94Apr 18, 95[G02F]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2008/0229,210 DISPLAY PROCESSING SYSTEMAbandonedMar 11, 08Sep 18, 08[G06F]
7251375 Tile boundary artifact removal for arbitrary wavelet filtersExpiredSep 14, 04Jul 31, 07[G06K]
2003/0178,514 Pulverization/classification apparatus for manufacturing powder, and method for manufacturing powder using the pulverization/classification apparatusAbandonedMar 20, 03Sep 25, 03[B02C]
6137597 Method of controlling network facsimile apparatusExpiredDec 05, 97Oct 24, 00[H04N]
5717497 Image-data transmitter having function of automatic segmented image codingExpiredMar 31, 95Feb 10, 98[H04N]
4400455 Layered organic electrophotographic photoconductor element comprising bisazo generating and hydrazone transport layersExpiredNov 30, 81Aug 23, 83[G03G]
4296418 Ink jet printing apparatus with reverse solvent flushing meansExpiredMay 23, 80Oct 20, 81[G01D]

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