Inventor
Masakazu Yamaguchi
Inventor
Kawasaki, JP
Overview
Patents· 47 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H10Dprimary
H10DInorganic electric semiconductor devices47%
A61KPreparations for medical, dental or toiletry purposes11%
A61QSpecific use of cosmetics or similar toiletry preparations11%
C07CAcyclic or carbocyclic compounds6%
H04NPictorial communication, e.g. television5%
C07DHeterocyclic compounds3%
H01LSemiconductor devices3%
H03KPulse technique3%
A45DHairdressing or shaving equipment2%
A61BDiagnosis2%
PatentTitleYear
RE047641Semiconductor device with super junction region2019RE047198Power semiconductor device20198,484,155'Hair evaluation method and system'20138,319,314'Semiconductor device'20127,896,931'Hair dye composition'20117,896,932'Non-oxidative hair dye composition'20117,772,641'Power semiconductor device with a plurality of gate electrodes'20107,651,538'Hair dye composition'20107,518,197'Power semiconductor device'20097,492,031'Semiconductor device'20097,476,261'Hair dye composition'20097,456,487'Semiconductor device'20087,361,954'Power semiconductor device'20087,319,257'Power semiconductor device'20087,238,576'Semiconductor device and method of manufacturing the same'20077,170,106'Power semiconductor device'20077,115,475'Method of manufacturing semiconductor device'20067,078,740'Power semiconductor device'20067,075,168'Semiconductor device'20066,995,426'Semiconductor device having vertical metal insulator semiconductor transistors having plural spatially overlapping regions of different conductivity type'20066,936,893'Power semiconductor device'20056,921,687'Power semiconductor element capable of improving short circuit withstand capability while maintaining low on-voltage and method of fabricating the same'20056,894,347'Power semiconductor element capable of improving short circuit withstand capability while maintaining low on-voltage and method of fabricating the same'20056,844,592'Semiconductor device with super junction region'20056,809,349'Power semiconductor device'20046,693,338'Power semiconductor device having RESURF layer'20046,670,658'Power semiconductor element capable of improving short circuit withstand capability while maintaining low on-voltage and method of fabricating the same'20036,569,412'Treatment composition for dyed hair'20036,545,341'Power transistor'20036,495,871'Power semiconductor element capable of improving short circuit withstand capability while maintaining low on-voltage and method of fabricating the same'20026,236,069'Insulated-gate thyristor'20016,114,727'Semiconductor device'20006,111,454'Power supply circuit'20006,054,748'High voltage semiconductor power device'20005,910,738'Driving circuit for driving a semiconductor device at high speed and method of operating the same'19995,793,065'Insulated-gate thyristor'19985,709,816'Singlet oxygen quenchers and external compositions containing the same'19985,554,862'Power semiconductor device'19965,464,994'Insulated-gate thyristor'19955,381,026'Insulated-gate thyristor'19955,371,296'4,4-dimethyl-1-phenylpentane-1,3-dione derivative and UV ray absorbent and cosmetic containing the same'19945,371,536'Automatic control of image pick-up position of object'19945,303,511'Spindle apparatus for supporting and rotating a workpiece'19945,206,721'Television conference system'19935,191,121'Aroyl ketone derivative, UV ray absorber comprising the same, and cosmetic composition containing the same'19935,146,002'Aroyl ketone derivative, UV ray absorber comprising the same, and cosmetic composition containing the same'19925,130,801'Image superimposing apparatus having limited memory requirement'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–2013Patents assigned to KAO CORP (10)· patent assignee history
1992–1994Patents assigned to FUJITSU LTD (3)· patent assignee history
1992–2019Based in Kawasaki, JP· patent location history
1992–1998Based in Ichikai-machi, JP· patent location history
1995–2019Patents assigned to TOSHIBA KK (33)· patent assignee history
1995–2013Based in Tokyo, JP· patent location history
2003–2019Based in Kanagawa, JP· patent location history
2009–2011Patents assigned to FUJIFILM CORP (3)· patent assignee history
2009–2011Based in Sumida-ku, JP· patent location history
2012–2013Patents assigned to YAMAGUCHI MASAKAZU (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| TOSHIBA KK | 33 | 1995–2019 |
| KAO CORP | 10 | 1992–2013 |
| FUJIFILM CORP | 3 | 2009–2011 |
| FUJITSU LTD | 3 | 1992–1994 |
| YAMAGUCHI MASAKAZUself | 2 | 2012–2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kawasaki, JP | 20 | 1992–2019 |
| Tokyo, JP | 10 | 1995–2013 |
| Kanagawa, JP | 9 | 2003–2019 |
| Sumida-ku, JP | 3 | 2009–2011 |
| Ichikai-machi, JP | 3 | 1992–1998 |