Inventor
Hajime Nakajima
Inventor
Tokyo, JP
Overview
Patents· 54 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G01Dprimary
G01DMeasuring not specially adapted for a specific variable22%
G01BMeasuring length, thickness or similar linear dimensions7%
A61BDiagnosis6%
H04NPictorial communication, e.g. television6%
E04BGeneral building constructions5%
G01SRadio direction-finding5%
G11BInformation storage based on relative movement between record carrier and transducer5%
B65HHandling thin or filamentary material, e.g. sheets, webs, cables3%
G06VImage or video recognition or understanding3%
B66BElevators2%
PatentTitleYear
10,399,817Elevator car position detection device20199,792,688'Position detection device'20179,702,735'Magnetic rotation-angle detector'20179,664,535'Rotation number detector'20179,631,953'Rotation number detector'20179,605,981'Absolute encoder'20179,588,236'Radioactivity analyzing apparatus'20179,462,150'Image read-in device with fastener to fasten transparent member retaining lens array assembly and light shield to board'20169,410,828'Servomotor and encoder'20169,222,993'Magnetic substance detection device'20158,979,265'Fundus camera'20158,939,581'Ophthalmologic photographing apparatus'20158,857,993'Ophthalmologic apparatus'20148,829,421'Optical encoder'20148,421,622'Monitoring system for moving object'20138,415,610'Optical encoder having a single signal track and an optical detecting part with sine and cosine signals'20138,157,377'Ophthalmologic photographing apparatus'20128,134,359'Magnetic rotational-angle detector'20127,939,796'Electronic device housing'20117,905,598'Ophthalmologic photographing apparatus'20117,577,279'Identity verification apparatus and fingerprint image pickup method'20097,538,313'Optical encoder having a no track portion of an optical scale being placed at a position symmetrical to a light non-transparent portion within an irradiation region of incident light'20097,470,892'Optical encoder'20087,285,769'Optical encoder with reduced reflected light error having a light non-transparent portion with inclined surfaces'20076,972,402'Photoelectric rotary encoder'20056,972,834'Optical distance sensor'20056,956,200'Phase-shift photoelectric encoder'20056,846,116'Sensor head'20056,657,185'Pattern detector for capturing images with reduced distortion'20036,631,788'Elevator system with safety installation'20036,351,312'Interference-type distance measuring device'20026,341,043'Optical axis conversion lens'20026,198,862'Optical position detector'20016,095,514'Sheet supplying apparatus and recording or reading apparatus'20006,054,938'Optical encoder'20006,010,125'Sheet supplying apparatus and recording apparatus or reading apparatus using the same'20005,968,435'Process for manufacturing pitch-type carbon fiber'19995,949,470'Roller unit and imaging apparatus using the same'19995,729,816'Sheet convey apparatus'19985,428,217'Annular photodiode for use in an optical rotary encoder'19955,426,296'Irregular pattern input device comprising an optical fiber bundle'19955,305,294'Magneto-optical recording/reproducing system having an electromagnetic actuator'19945,283,959'System for drying moist sludge'19945,281,806'Optical writing type liquid crystal light valve and writing apparatus therefor'19945,264,941'Large screen display apparatus utilizing a transparent plate to display an image over an entire surface of a diffusing surface'19935,247,493'Magneto-optical recording and reproducing disk device having a bimorph type actuator with specific structures for mounting a magnetic head in opposing to the surface of the disk'19935,231,282'Optical writing type liquid crystal light valve and writing apparatus therefor'19935,150,556'Chord truss roof structure'19925,148,650'Radiating truss roof support array and construction method therefor'19925,117,594'Openable roof apparatus'19925,115,424'Optical storage medium with provision for limitation of thermal conduction'19925,107,483'Frequency selective optical data record/regenerate apparatus'19925,058,334'Radiating truss roof support array and construction method therefor'19914,432,097'Tone control circuit'1984Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1984–1999Based in Yokohama, JP· patent location history
1991–2017Based in Tokyo, JP· patent location history
1992–2019Patents assigned to MITSUBISHI ELECTRIC CORP (36)· patent assignee history
1992–1994Based in Amagasaki, JP· patent location history
1992–1995Based in Hyogo, JP· patent location history
1998–2015Patents assigned to CANON KK (9)· patent assignee history
2002–2005Patents assigned to KARLSRUHE FORSCHZENT (3)· patent assignee history
2012–2017Patents assigned to NAKAJIMA HAJIME (10)· patent assignee history
2012–2017Patents assigned to MUSHA TAKESHI (5)· patent assignee history
2016–2019Based in Chiyoda-ku, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MITSUBISHI ELECTRIC CORP | 36 | 1992–2019 |
| NAKAJIMA HAJIMEself | 10 | 2012–2017 |
| CANON KK | 9 | 1998–2015 |
| MUSHA TAKESHI | 5 | 2012–2017 |
| KARLSRUHE FORSCHZENT | 3 | 2002–2005 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 36 | 1991–2017 |
| Chiyoda-ku, JP | 7 | 2016–2019 |
| Amagasaki, JP | 6 | 1992–1994 |
| Hyogo, JP | 3 | 1992–1995 |
| Yokohama, JP | 2 | 1984–1999 |