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Inventor

Tsutomu Onuma

Inventor
Yokohama, JP

Overview

31→
Patents
1982–2010
Patent span
Physics
Primary field (CPC G)

Patents· 31 as inventor

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

G03Gprimary
G03GElectrography42%
B23KSoldering or unsoldering13%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution5%
Y10TTechnical subjects covered by former us classification5%
B23PMetal-working not otherwise provided for4%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form4%
C21DModifying the physical structure of ferrous metals4%
F03BMachines or engines for liquids4%
F05BIndexing scheme relating to wind, spring, weight, inertia or like motors, to machines or engines for liquids covered by subclasses f03b, f03d and f03g4%
PatentTitleYear
7,745,089'Process for producing toner, and toner'20107,457,572'Image forming method and process cartridge using specific toner regulating blade and toner'20087,351,509'Toner'20087,306,889'Process for producing toner, and toner'20077,288,354'Toner'20077,273,686'Toner'20076,810,217'Process cartridge'20046,673,506'Toner production process'20046,630,275'Magnetic toner and process cartridge'20036,589,701'Dry toner, image forming method and process cartridge'20036,541,174'Method using toner and developer for developing electrostatic image'20036,537,716'Toner for developing electrostatic images and heat fixing method'20036,458,499'Toner having hydrocarbon wax with specific ester value and hydroxyl value'20026,426,169'Toner containing azo iron compound'20026,187,496'Toner and developer for developing electrostatic image, process for production thereof and image forming method'20016,120,961'Toner for developing electrostatic images'20006,077,638'Toner and developer for developing electrostatic image, process for production thereof and image forming method'20006,020,102'Positive-chargeable toner, image forming method and apparatus unit'20006,007,957'Magnetic toner, image forming method and process cartridge'19995,977,515'Underwater laser processing device including chamber with partitioning wall'19995,968,701'Toner and image forming method'19995,938,954'Submerged laser beam irradiation equipment'19995,879,132'Stainless steel type 13Cr5Ni having high toughness, and usage of the same'19995,654,992'Method of repairing structural materials of nuclear reactor internals and apparatus therefor'19975,628,449'Method of welding a carbon steel and an austenitic stainless steel together and resultant structure'19975,605,778'Toner with wax component for developing electrostatic image'19975,601,411'Stainless steel type 13Cr5Ni having high toughness, and usage the same'19975,384,224'Toner for developing electrostatic image'19955,364,722'Toner for developing electrostatic image and heat-fixing method comprising a hydrocarbon wax'19944,499,158'Welded structural member having high erosion resistance'19854,348,131'Welded structure having improved mechanical strength and process for making same'1982

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1982–1999Patents assigned to HITACHI LTD (8)· patent assignee history
1982–1999Based in Hitachi, JP· patent location history
1994–2010Patents assigned to CANON KK (23)· patent assignee history
1994–1995Based in Kawasaki, JP· patent location history
1997–2010Based in Yokohama, JP· patent location history
2004–2008Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CANON KK231994–2010
HITACHI LTD81982–1999
Locations
LocationPatentsSpan
Yokohama, JP151997–2010
Hitachi, JP81982–1999
Kanagawa, JP62004–2008
Kawasaki, JP21994–1995