Inventor
Hirofumi Ogawa
Inventor
Hachioji, JP
Overview
Patents· 40 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Jprimary
H01JElectric discharge tubes or discharge lamps13%
B60JWindows, windscreens, non-fixed roofs, doors, or similar devices for vehicles10%
G03GElectrography10%
G06FElectric digital data processing10%
B01DSeparation6%
H04NPictorial communication, e.g. television6%
H10FInorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation4%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution4%
B60RVehicles, vehicle fittings, or vehicle parts, not otherwise provided for3%
H05KPrinted circuits3%
PatentTitleYear
11,022,795Vehicle display control device202110,513,169Weather strip for automobile201910,433,420Circuit board device and printed wiring board201910,375,819Circuit board device201910,365,872Print instruction apparatus and non-transitory computer readable medium201910,334,124Information processing apparatus, non-transitory computer readable medium, and information processing system for print job management201910,081,232Weatherstrip assembly for a vehicle201810,035,410Parting seal and sealing structure of parting portion20189,795,932'Porous hollow fiber membrane and a porous hollow fiber membrane for the treatment of a protein-containing liquid'20179,492,794'Porous hollow fiber membrane for treatment of protein-containing liquid'20169,241,083'Apparatus, method, and computer readable medium for displaying gesture guidance information'20169,239,675'Input display apparatus and method, image forming apparatus, imaging apparatus, and computer readable medium'20168,881,915'Polymeric porous hollow fiber membrane'20148,782,955'Sealing structure of weather strip for retractable roof vehicles'20148,479,450'Weather strip having a drainage structure'20138,434,813'Drainage structure of weather strip'20138,408,633'Seal structure for retractable roof vehicle'20138,225,941'Hollow fiber membrane for treating liquids'20128,085,081'Semiconductor device for output of pulse waveforms'20117,546,049'Image forming device with a control means to correct the fixing control temperature'20097,509,085'Image forming apparatus, fixing apparatus and toner'20097,199,655'Multistage amplifier circuit without interstage coupling capacitor'20077,022,944'Image forming apparatus preventing excessive increase in temperature of fixing device'20066,881,927'Image forming apparatus preventing excessive increase in temperature of fixing device'20056,785,505'Fixing device preventing rubbing of toner image'20046,636,709'Fixing device having temperature detecting member and image forming apparatus using said fixing device'20036,628,916'Fixing device preventing rubbing of toner image'20036,070,695'Silencer'20005,625,457'Method and apparatus for non-contact measurement of relative displacement'19975,335,140'Drawer-type circuit interrupter'19945,305,559'Method of grinding core blank for magnetic heads, using markers for determining grinding depth for nominal magnetic gap depth'19945,233,265'Photoconductive imaging apparatus'19935,218,264'Image pick-up tube and apparatus having the same'19934,952,839'Photoconductive device and method of operating the same'19904,888,521'Photoconductive device and method of operating the same'19894,883,562'Method of making a photosensor'19894,636,682'Image pickup tube'19874,626,885'Photosensor having impurity concentration gradient'19864,609,846'Image pick-up tube having collector and balance electrodes'19864,556,817'Photoelectric conversion apparatus'1985Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1985–1993Patents assigned to HITACHI LTD (9)· patent assignee history
1985–1993Based in Hachioji, JP· patent location history
1989–1993Patents assigned to JAPAN BROADCASTING CORP (5)· patent assignee history
2003–2009Patents assigned to RICOH KK (6)· patent assignee history
2003–2019Based in Kanagawa, JP· patent location history
2011–2017Patents assigned to OGAWA HIROFUMI (10)· patent assignee history
2012–2017Based in Ohtsu, JP· patent location history
2013–2019Patents assigned to NISHIKAWA RUBBER CO LTD (7)· patent assignee history
2013–2019Based in Hiroshima, JP· patent location history
2019Based in Yokohama, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| OGAWA HIROFUMIself | 10 | 2011–2017 |
| HITACHI LTD | 9 | 1985–1993 |
| NISHIKAWA RUBBER CO LTD | 7 | 2013–2019 |
| RICOH KK | 6 | 2003–2009 |
| JAPAN BROADCASTING CORP | 5 | 1989–1993 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hachioji, JP | 9 | 1985–1993 |
| Kanagawa, JP | 8 | 2003–2019 |
| Hiroshima, JP | 7 | 2013–2019 |
| Ohtsu, JP | 4 | 2012–2017 |
| Yokohama, JP | 2 | 2019 |