Inventor
Shigeyuki Harada
Inventor
Shizuoka, JP
Overview
Patents· 50 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C09Dprimary
C09DCoating compositions, e.g. paints, varnishes or lacquers21%
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds11%
G09GArrangements or circuits for control of indicating devices using static means to present variable information10%
B41JTypewriters8%
B41MPrinting, duplicating, marking, or copying processes8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%
Y10TTechnical subjects covered by former us classification6%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein5%
C09KMaterials for miscellaneous applications, not provided for elsewhere4%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients3%
PatentTitleYear
10,844,235Ink, method of manufacturing ink, and ink cartridge202010,807,377Ink, ink cartridge, image forming method, and printed matter202010,633,549Ink, ink accommodating container, image forming method, and image forming device202010,370,548Copolymer, ink including copolymer, and ink-stored container201910,280,321Ink, ink container, inkjet recording device, and recorded matter201910,273,373Ink and method for producing same, and ink stored container, printing method, and printing apparatus201910,233,341Ink, method of manufacturing ink, and ink cartridge201910,035,869Copolymer, aqueous ink, and ink cartridge201810,000,656Ink, recorded matter, ink container, recording device, and recording method20189,988,543Ink, ink stored container, inkjet recording apparatus, and recorded matter20189,896,530'Copolymer, coloring material dispersion, ink, and ink store container'20189,850,391Ink, ink stored container, inkjet printing method, and inkjet printing device20179,850,335Copolymer, aqueous ink, and ink cartridge20179,777,091'Copolymer, ink, and ink container'20179,617,439'Ink composition, ink cartridge, ink recording device, and recorded matter'20179,422,437'Copolymer, aqueous ink, and ink cartridge'20169,416,284'Copolymer, aqueous ink, and ink cartridge'20169,365,670'Copolymer, aqueous ink, and ink cartridge'20169,353,274'Ink, ink cartridge, inkjet recording device, and copolymer'20169,321,926'Ink for inkjet recording, ink cartridge, and ink-recorded matter'20169,263,682'Light emitting device and display unit'20169,217,089'Ink for inkjet recording'20159,206,202'Carbazole derivative and semiconductor nanocrystal'20159,117,618'Ion generating apparatus'20158,998,400'Copolymer, aqueous ink, and ink cartridge'20158,765,903'Carbazole polymer and method of manufacturing same'20147,758,932'Liquid crystal display device and display apparatus'20107,658,979'Liquid crystal alignment film composition, liquid crystal device and display apparatus'20106,913,709'Liquid crystalline gel composition, and display medium, display device and display body using same'20056,816,146'Electrophoretic display liquid and electrophoretic display medium and device using the liquid having predetermined different volume medium particle diameters'20046,693,621'Electrophoretic display method, display medium, liquid and particle for display medium, display apparatus, and reversible display material'20046,621,228'EL display apparatus'20036,400,492'Electrophoretic display liquid, and electrophoretic display medium, method and device using the liquid'20026,136,751'Reversible thermosensitive recording medium, and image forming and erasing method'20005,780,387'Reversible thermosensitive recording medium'19985,409,884'Thermal image transfer recording medium'19955,352,527'Thermal image transfer recording medium'19945,328,754'Thermosensitive image transfer ink sheet'19945,262,766'Display unit having brightness control function'19935,260,139'Thermal image transfer recording medium'19935,248,543'Thermal image transfer sheet and thermal image transfer recording medium for use with clothing'19935,206,631'Method and apparatus for driving a capacitive flat matrix display panel'19934,983,885'Thin film EL display panel drive circuit'19914,935,671'Thin-film EL display panel drive'19904,914,353'Thin-film EL display panel drive circuit'19904,888,523'Driving circuit of thin membrane EL display apparatus'19894,866,348'Drive system for a thin-film el panel'19894,864,182'Driving circuit for thin film EL display device'19894,823,121'Electroluminescent panel driving system for driving the panel\'s electrodes only when non-blank data is present to conserve power'19894,686,426'Thin-film EL display panel drive circuit with voltage compensation'1987Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1987–1993Based in Nara, JP· patent location history
1993–2010Based in Numazu, JP· patent location history
1994–1998Based in Mishima, JP· patent location history
2002–2020Based in Shizuoka, JP· patent location history
2014–2020Patents assigned to RICOH CO LTD (25)· patent assignee history
2014–2020Patents assigned to HARADA SHIGEYUKI (23)· patent assignee history
2015–2020Patents assigned to KOIZUKA YUUSUKE (18)· patent assignee history
2015–2019Patents assigned to NAGAI KAZUKIYO (17)· patent assignee history
2015–2019Patents assigned to FUKUOKA MASAYUKI (13)· patent assignee history
2015Based in Osaka, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| RICOH CO LTD | 25 | 2014–2020 |
| HARADA SHIGEYUKIself | 23 | 2014–2020 |
| KOIZUKA YUUSUKE | 18 | 2015–2020 |
| NAGAI KAZUKIYO | 17 | 2015–2019 |
| FUKUOKA MASAYUKI | 13 | 2015–2019 |
Locations
| Location | Patents | Span |
|---|---|---|
| Shizuoka, JP | 30 | 2002–2020 |
| Nara, JP | 10 | 1987–1993 |
| Mishima, JP | 4 | 1994–1998 |
| Numazu, JP | 3 | 1993–2010 |
| Osaka, JP | 1 | 2015 |