Inventor
Hitoshi Maki
Inventor
Tokyo, JP
Overview
Patents· 12 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C09Bprimary
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments41%
C07CAcyclic or carbocyclic compounds18%
C09DCoating compositions, e.g. paints, varnishes or lacquers12%
G11BInformation storage based on relative movement between record carrier and transducer12%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry6%
C07DHeterocyclic compounds6%
C08JWorking-up6%
PatentTitleYear
7,001,937'Process for producing colored resin composition and utilization thereof'20066,989,055'Monoazo lake pigment composition and gravure ink using the same'20066,303,762'Method of producing disazo pigment'20015,817,817'Process for the production of 2,5-di(arylamino)-3,6-dihydroterephthalic acid dialkyl ester, and process for the production of quinacridone from said ester as intermediate'19985,808,154'Process for the production of an aromatic hydrazo compound'19985,659,036'Process for the production of 2,5-di(arylamino)-3,6-dihydroterephthalic acid dialkyl ester, and process for the production of quinacridone from said ester as intermediate'19975,622,555'Process for the production of dis-azo pigment'19975,610,306'Process for the production of 6,13-dihydroquinacridones and apparatus for use for the production'19975,472,490'Pigment composition, printing ink and coating composition'19955,400,199'Floating magnetic head with variable chamfered surface'19955,318,626'Process for converting 2,9-dimethylquinacridone compound into pigment'19945,136,444'Floating type magnetic head having a magnetic gap for recording tracks at the outer periphery of a magnetic disk'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–1995Patents assigned to TDK CORP (2)· patent assignee history
1992–1995Based in Yamanashi, JP· patent location history
1994–2006Patents assigned to TOYO INK MFG CO (10)· patent assignee history
1994–2006Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| TOYO INK MFG CO | 10 | 1994–2006 |
| TDK CORP | 2 | 1992–1995 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 10 | 1994–2006 |
| Yamanashi, JP | 2 | 1992–1995 |