Inventor
Masaki Okubo
Inventor
Koriyama, JP
Overview
Patents· 13 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G03Gprimary
G03GElectrography36%
C07DHeterocyclic compounds21%
C07CAcyclic or carbocyclic compounds9%
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments9%
C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium6%
C01BNon-metallic elements3%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds3%
C09CTreatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties3%
H01LSemiconductor devices3%
H10HInorganic light-emitting semiconductor devices having potential barriers3%
PatentTitleYear
9,893,038'Light-emitting device having first and second wiring patterns'20189,835,965Charge control agent and toner using same20179,703,223'Toner, developer, and toner cartridge'20179,141,014'Toner for developing electrostatic charge image'20158,962,866'Surface-modified silica powder and method for producing the same, as well as toner composition for electrophotography'20158,580,470'Charge control agent composition and toner utilizing the same'20137,901,858'Mixed cyclic phenol sulfides, and charge control agents and toners using the same'20117,820,832'Oxidized mixed cyclic phenol sulfides, and charge control agents and toners using the same'20107,709,172'Oxidized mixed cyclic phenol sulfides, and charge control agents and toners using the same'20107,402,369'Mono azo iron complex compound, and charge controlling agent and toner using the same'20087,094,512'Electrophotographic printing method, monoazo iron complex compound, charge controlling agent using the same and toner using the charge controlling agent'20066,627,368'Organic metal complex compound and electrostatic image developing toner using the same'20035,312,707'Electrophotographic photoconductor and diamine compounds for use in the same'1994Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1994–2017Patents assigned to HODOGAYA CHEMICAL CO LTD (12)· patent assignee history
2003–2013Based in Koriyama, JP· patent location history
2006–2011Based in Fukushima, JP· patent location history
2013–2015Patents assigned to OKUBO MASAKI (3)· patent assignee history
2013–2015Patents assigned to OTSUKA HIDEYUKI (3)· patent assignee history
2015Patents assigned to AMANO YUKI (1)· patent assignee history
2015Patents assigned to AOKI YOSHIKAZU (1)· patent assignee history
2015–2017Based in Ibaraki, JP· patent location history
2017Based in Tokyo, JP· patent location history
2018Based in Tokushima, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HODOGAYA CHEMICAL CO LTD | 12 | 1994–2017 |
| OKUBO MASAKIself | 3 | 2013–2015 |
| OTSUKA HIDEYUKI | 3 | 2013–2015 |
| AMANO YUKI | 1 | 2015 |
| AOKI YOSHIKAZU | 1 | 2015 |
Locations
| Location | Patents | Span |
|---|---|---|
| Koriyama, JP | 4 | 2003–2013 |
| Fukushima, JP | 3 | 2006–2011 |
| Ibaraki, JP | 2 | 2015–2017 |
| Tokushima, JP | 1 | 2018 |
| Tokyo, JP | 1 | 2017 |