Ricoh Co Ltd
Ricoh Co LActive Patents
2
Total Holdings
95
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| JP2008158018A | Image forming apparatus | Active / In Force | 2006-12-21 | — | 0 | Details |
| US20040004644A1 | Color image processing apparatus, color image forming metho… | Expired / Lapsed | 2003-05-29 | — | 16 | Details |
| JP2002041541A | Video search device | Expired / Lapsed | 2001-05-21 | — | 0 | Details |
| DE19936599A1 | Auto-focusing apparatus for digital camera, changes amount … | Expired / Lapsed | 1999-08-04 | — | 0 | Details |
| EP0601550A2 | Method and apparatus for semantic pattern matching for text… | Expired / Lapsed | 1993-12-07 | — | 26 | Details |
| JPH05225641A | Magneto-optical disk device | Expired / Lapsed | 1992-02-13 | — | 0 | Details |
| JPS5835511A | liquid crystal display element | Expired / Lapsed | 1981-08-27 | — | 0 | Details |
| JPS5599875A | Facsimile unit of original size automatic designation | Expired / Lapsed | 1979-01-24 | — | 0 | Details |
| JPS5479631A | Color ink jet printer | Expired / Lapsed | 1977-12-08 | — | 0 | Details |
| JPS5479036A | Color ink jet printer | Expired / Lapsed | 1977-12-05 | — | 0 | Details |
| JPS5410731A | Liquid injector | Expired / Lapsed | 1977-06-27 | — | 0 | Details |
| JPS5347829A | Color printer of ink jet type | Expired / Lapsed | 1976-10-12 | — | 0 | Details |
| US8483598B2 | Electrophotographic image forming method and apparatus with… | Active / In Force | 2010-04-12 | 2013-07-09 | 20 | Details |
| US7095907B1 | Content and display device dependent creation of smaller re… | Expired / Lapsed | 2002-01-10 | 2006-08-22 | 93 | Details |
| US6976229B1 | Method and apparatus for storytelling with digital photogra… | Expired / Lapsed | 1999-12-16 | 2005-12-13 | 53 | Details |
| US6898329B1 | Image binarization apparatus, image binarization method, im… | Expired / Lapsed | 2000-04-17 | 2005-05-24 | 86 | Details |
| US6647534B1 | Method and system for organizing document information in a … | Expired / Lapsed | 1999-06-30 | 2003-11-11 | 41 | Details |
| US6624826B1 | Method and apparatus for generating visual representations … | Expired / Lapsed | 1999-09-28 | 2003-09-23 | 33 | Details |
| US6489936B1 | Selection of image processing operation using network based… | Expired / Lapsed | 1999-06-11 | 2002-12-03 | 14 | Details |
| US6369811B1 | Automatic adaptive document help for paper documents | Expired / Lapsed | 1998-09-09 | 2002-04-09 | 28 | Details |
| US6356923B1 | Document information management system | Expired / Lapsed | 1998-07-21 | 2002-03-12 | 25 | Details |
| US6281896B1 | Data processor controlled interface with multiple tree of e… | Expired / Lapsed | 1998-03-31 | 2001-08-28 | 29 | Details |
| US6182090B1 | Method and apparatus for pointing to documents electronical… | Expired / Lapsed | 1997-03-31 | 2001-01-30 | 8 | Details |
| US6137595A | Color conversion processing method for color matching and a… | Expired / Lapsed | 1998-04-16 | 2000-10-24 | 42 | Details |
| USD391249S | Portion of a computer screen with an icon | Expired / Lapsed | 1993-05-10 | 1998-02-24 | 1 | Details |
| USD389135S | Portion of a screen of a programmed computer system | Expired / Lapsed | 1993-05-10 | 1998-01-13 | 1 | Details |
| USD388071S | Portion of a screen of a programmed computer system | Expired / Lapsed | 1993-05-10 | 1997-12-23 | 1 | Details |
| USD387047S | Portion of a screen of a programmed computer system | Expired / Lapsed | 1993-05-10 | 1997-12-02 | 1 | Details |
| US5576845A | Encoding apparatus and method for processing color data in … | Expired / Lapsed | 1994-05-19 | 1996-11-19 | 6 | Details |
| US5216429A | Position measuring system using pseudo-noise signal transmi… | Expired / Lapsed | 1992-04-17 | 1993-06-01 | 11 | Details |
| US5153779A | Lens for reading original | Expired / Lapsed | 1991-08-19 | 1992-10-06 | 4 | Details |
| US5144552A | Optical information storage medium having grooves and pits … | Expired / Lapsed | 1991-05-06 | 1992-09-01 | 5 | Details |
| US5144617A | Optical information read/write apparatus | Expired / Lapsed | 1990-11-08 | 1992-09-01 | 11 | Details |
| US5093870A | Smoothing method and apparatus for smoothing contour of cha… | Expired / Lapsed | 1989-03-23 | 1992-03-03 | 16 | Details |
| US5065254A | Facsimile machine and facsimile transmission system | Expired / Lapsed | 1989-11-24 | 1991-11-12 | 28 | Details |
| US5041918A | Facsimile adapter unit | Expired / Lapsed | 1990-06-29 | 1991-08-20 | 11 | Details |
| US5015050A | Fθ lens system in optical scanner | Expired / Lapsed | 1989-12-21 | 1991-05-14 | 20 | Details |
| US4999716A | Facsimile communication method and facsimile machine | Expired / Lapsed | 1989-08-03 | 1991-03-12 | 24 | Details |
| US4953013A | Color image processing device | Expired / Lapsed | 1988-10-05 | 1990-08-28 | 15 | Details |
| US4887259A | Communication network having multi-conjunction architecture | Expired / Lapsed | 1988-09-07 | 1989-12-12 | 19 | Details |
| US4809016A | Inkjet interlace printing with inclined printhead | Expired / Lapsed | 1987-03-02 | 1989-02-28 | 18 | Details |
| US4756584A | Scanning optical system with irregular deflecting surface c… | Expired / Lapsed | 1987-01-27 | 1988-07-12 | 7 | Details |
| USD293794S | Image scanner | Expired / Lapsed | 1985-10-11 | 1988-01-19 | 1 | Details |
| US4607289A | Facsimile transceiver capable of storing and relaying data | Expired / Lapsed | 1983-02-16 | 1986-08-19 | 5 | Details |
| US4601574A | Distance measuring apparatus | Expired / Lapsed | 1985-04-01 | 1986-07-22 | 10 | Details |
| USD284386S | Electrostatic copying machine | Expired / Lapsed | 1983-09-26 | 1986-06-24 | 1 | Details |
| US4589111A | Arq equipped data communication system | Expired / Lapsed | 1983-06-14 | 1986-05-13 | 7 | Details |
| US4586811A | Confidential document reproduction prevention method | Expired / Lapsed | 1983-04-14 | 1986-05-06 | 10 | Details |
| US4580121A | Magnet roll and method for manufacturing the same | Expired / Lapsed | 1984-01-30 | 1986-04-01 | 22 | Details |
| US4554556A | Color plotter | Expired / Lapsed | 1983-04-28 | 1985-11-19 | 17 | Details |
| US4533959A | Picture processing apparatus | Expired / Lapsed | 1982-11-18 | 1985-08-06 | 5 | Details |
| US4527892A | Distance measuring apparatus | Expired / Lapsed | 1982-12-01 | 1985-07-09 | 10 | Details |
| US4525625A | Focussing control with astigmatic diffracting means | Expired / Lapsed | 1981-06-08 | 1985-06-25 | 9 | Details |
| US4523235A | Electronic microcopier apparatus | Expired / Lapsed | 1982-01-11 | 1985-06-11 | 43 | Details |
| US4519695A | Image density control method for electrophotography | Expired / Lapsed | 1983-02-07 | 1985-05-28 | 5 | Details |
| US4516272A | Communication network | Expired / Lapsed | 1983-02-15 | 1985-05-07 | 21 | Details |
| USD278435S | I/O Terminal for data communication | Expired / Lapsed | 1982-11-17 | 1985-04-16 | 1 | Details |
| US4485408A | Halftone processing method for digital facsmile apparatus | Expired / Lapsed | 1982-07-07 | 1984-11-27 | 7 | Details |
| US4424245A | Thermosensitive-recording-type label sheet | Expired / Lapsed | 1982-02-24 | 1984-01-03 | 12 | Details |
| US4388362A | Released heat-sensitive recording paper | Expired / Lapsed | 1981-10-08 | 1983-06-14 | 11 | Details |
| US4387975A | Automatic focusing position detection apparatus | Expired / Lapsed | 1980-10-28 | 1983-06-14 | 12 | Details |
| US4373791A | Focusing position detection apparatus | Expired / Lapsed | 1980-02-20 | 1983-02-15 | 13 | Details |
| US4360883A | Method of restoring a picture cell by estimation with high … | Expired / Lapsed | 1980-08-06 | 1982-11-23 | 3 | Details |
| US4337394A | Mark means for adjusting the position of solid-state line i… | Expired / Lapsed | 1980-07-08 | 1982-06-29 | 9 | Details |
| USD263708S | Facsimile recorder and transceiver | Expired / Lapsed | 1980-06-04 | 1982-04-06 | 1 | Details |
| US4300144A | Multiple-nozzle ink-jet recording apparatus | Expired / Lapsed | 1979-10-18 | 1981-11-10 | 4 | Details |
| US4277162A | Electrophotographic apparatus comprising density sensor mea… | Expired / Lapsed | 1979-07-12 | 1981-07-07 | 17 | Details |
| US4256401A | Image density adjustment method and apparatus | Expired / Lapsed | 1979-01-08 | 1981-03-17 | 12 | Details |
| US4254201A | Pressure sensitive adhesive toner of clustered encapsulated… | Expired / Lapsed | 1979-04-27 | 1981-03-03 | 13 | Details |
| US4239374A | Electrostatographic apparatus comprising automatic document… | Expired / Lapsed | 1978-12-07 | 1980-12-16 | 22 | Details |
| US4173402A | Optoelectronic sensing apparatus | Expired / Lapsed | 1978-03-06 | 1979-11-06 | 11 | Details |
| US4153364A | Exposure and development control apparatus for electrostati… | Expired / Lapsed | 1978-01-27 | 1979-05-08 | 11 | Details |
| US4132477A | Optical imaging system for electrophotography | Expired / Lapsed | 1976-12-23 | 1979-01-02 | 10 | Details |
| US4087171A | Electrophotographic exposure and development system | Expired / Lapsed | 1975-10-20 | 1978-05-02 | 26 | Details |
| US4082902A | Spark-recording type printing method and spark-recording ma… | Expired / Lapsed | 1974-09-10 | 1978-04-04 | 16 | Details |
| USD247296S | Electrostatic copier | Expired / Lapsed | 1976-09-07 | 1978-02-21 | 1 | Details |
| US4068301A | Data storage device comprising search means | Expired / Lapsed | 1975-10-14 | 1978-01-10 | 10 | Details |
| US4050806A | Method and apparatus for electrically biasing developing el… | Expired / Lapsed | 1975-05-07 | 1977-09-27 | 25 | Details |
| US4045802A | Ink ejection printing apparatus comprising automatically ac… | Expired / Lapsed | 1976-07-27 | 1977-08-30 | 16 | Details |
| US4035069A | Exposure and development system for electrophotography | Expired / Lapsed | 1975-07-08 | 1977-07-12 | 15 | Details |
| US3964431A | Device for supplying an offset preventing liquid to a fixin… | Expired / Lapsed | 1974-05-17 | 1976-06-22 | 6 | Details |
| US3962545A | Utility meter reading system using telephone line | Expired / Lapsed | 1974-07-25 | 1976-06-08 | 13 | Details |
| US3956580A | System for reducing the transmission time of similar portio… | Expired / Lapsed | 1975-02-03 | 1976-05-11 | 8 | Details |
| US3914045A | Method and apparatus for removing residual image from photo… | Expired / Lapsed | 1974-04-24 | 1975-10-21 | 21 | Details |
| US3902160A | Pattern recognition system | Expired / Lapsed | 1973-12-28 | 1975-08-26 | 8 | Details |
| US3801737A | Video signal compression and expansion system and devices t… | Expired / Lapsed | 1972-07-10 | 1974-04-02 | 21 | Details |
| US3770344A | Light source system for overhead projectors | Expired / Lapsed | 1970-05-19 | 1973-11-06 | 13 | Details |
| US3713371A | Automatic focusing camera | Expired / Lapsed | 1971-02-09 | 1973-01-30 | 8 | Details |
| US3654478A | Radiation sensitive card reader with compensation for optic… | Expired / Lapsed | 1970-02-09 | 1972-04-04 | 10 | Details |
| US3618017A | Data processing system | Expired / Lapsed | 1969-06-23 | 1971-11-02 | 4 | Details |
| US3601092A | Developing device for wet process electrophotography | Expired / Lapsed | 1970-02-26 | 1971-08-24 | 5 | Details |
| US3574456A | Apparatus for producing electrophotographic copies | Expired / Lapsed | 1967-10-10 | 1971-04-13 | 7 | Details |
| US3549373A | Negative-to-positive reversible copy sheet | Expired / Lapsed | 1967-03-13 | 1970-12-22 | 0 | Details |
| US3504972A | Exposure adjusting apparatus for a duplicator | Expired / Lapsed | 1967-09-28 | 1970-04-07 | 0 | Details |
| US3299272A | Photosensitive system for taking out desired portions of re… | Expired / Lapsed | 1964-02-06 | 1967-01-17 | 2 | Details |