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Inventor

Takeshi Ohtake

Inventor
Shizuoka, JP

Overview

4→
Patents
1986–2001
Patent span
Physics
Primary field (CPC G)

Patents· 4 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G03Gprimary
G03GElectrography50%
C07CAcyclic or carbocyclic compounds13%
C07DHeterocyclic compounds13%
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments13%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%
PatentTitleYear
6,218,065'Toner having negative triboelectric chargeability and developing method'20016,040,103'Toner for developing electrostatic image and image forming method'20004,673,630'Photoconductive film and electrophotographic photosensitive member contains azulenium salt'19874,629,670'Photoconductive film of azulenium salt and electrophotographic photosensitive member'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–2001Patents assigned to CANON KK (4)· patent assignee history
1986–1987Based in Fujisawa, JP· patent location history
2000–2001Based in Shizuoka, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CANON KK41986–2001
Locations
LocationPatentsSpan
Shizuoka, JP22000–2001
Fujisawa, JP21986–1987