Inventor

Yasuo Fujiwara

Inventor

Tokyo, JP

Overview

36→

Patents

1978–2021

Patent span

Performing operations

Primary field (CPC B)

Patents· 36 as inventor

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

Y10Sprimary

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%

G03GElectrography8%

E02FDredging8%

B60KArrangement or mounting of propulsion units or of transmissions in vehicles7%

B60WConjoint control of vehicle sub-units of different type or different function7%

Y02TClimate change mitigation technologies related to transportation7%

B60YIndexing scheme relating to aspects cross-cutting vehicle technology6%

F16HGearing6%

C12NMicroorganisms or enzymes5%

C12PFermentation or enzyme-using processes to synthesise a desired chemical compound or composition or to separate optical isomers from a racemic mixture4%

PatentTitleYear

11,112,731Developer container, developing device, and image forming apparatus2021 11,086,251Image forming apparatus including control circuitry to execute a warm-up operation2021 10,934,685Work vehicle and method of controlling work vehicle2021 10,407,864Work vehicle and control method for same2019 10,370,823Work vehicle and method of controlling work vehicle2019 9,885,168'Work vehicle and control method for same'2018 9,732,499'Work vehicle and control method for same'2017 9,695,574'Work vehicle and control method for same'2017 9,540,006'Work vehicle and control method thereof'2017 9,267,269'Work vehicle and control method for same'2016 6,272,300'Remanufacturing method for process cartridge, process cartridge and image forming apparatus'2001 6,246,848'Toner Container cap, toner container, and process cartridge'2001 6,157,796'Developer container, process cartridge, developer sealing member and developer container sealing method'2000 6,121,343'Perfume-containing controlled release biodegradable resin composition'2000 6,118,957'Sealing member, process cartridge and developer supply container'2000 6,097,907'Developer container, process cartridge, developer sealing member and sealing method'2000 5,996,701'Control method and system for construction machine'1999 5,909,606'Tearable sealing member, developing apparatus and process cartridge'1999 5,752,131'Developing apparatus with a removable sealing film and process cartridge and image forming apparatus including such a developing apparatus'1998 5,689,772'Frame, developing apparatus, process cartridge and electro-photographic image forming apparatus having a toner frame and a developing frame coupled thereto'1997 5,019,467'Thin primary cell'1991 4,839,747'Image processing method and apparatus'1989 4,585,431'Sprocket assembly for a track type vehicle'1986 4,404,409'Process for preparing methyl tertiary-butyl ether'1983 4,370,415'Process for producing uroporphyrin III'1983 4,351,572'Track roller suspension apparatus for a track-type vehicle'1982 4,347,184'Process for separating and recovering coproporphyrin and uroporphyrin from a culture broth containing them'1982 4,334,021'Process for producing coproporphyrin III'1982 4,256,465'Method for producing methyl tert-butyl ether and fuel composition containing the same'1981 4,210,720'Process for fermentatively producing vitamin B.sub.12'1980 4,182,765'Oil soluble fungicide obtained from the reaction of a quaternary ammonium salt and an alkyl benzene sulfonic acid'1980 4,182,913'Method for producing methyl tert-butyl ether and fuel composition containing the same'1980 4,129,651'Method of removing nitrogen oxides in exhaust combustion gases'1978 4,119,492'Process for fermentatively producing vitamin B.sub.12'1978 4,110,065'Cock apparatus of automatic ignition type for gas appliance'1978 4,086,138'Process for producing glucose isomerase'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1983Patents assigned to NIPPON OIL CO LTD (10)· patent assignee history

1978Patents assigned to AERO SPEC PRODUCTS CO LTD (1)· patent assignee history

1978–1983Based in Tokyo, JP· patent location history

1982–2021Patents assigned to KOMATSU MFG CO LTD (11)· patent assignee history

1989–2021Based in Kanagawa, JP· patent location history

1991–2001Based in Urawa, JP· patent location history

1997–2001Patents assigned to CANON KK (8)· patent assignee history

2000–2001Based in Kashiwa, JP· patent location history

2016–2021Based in Hiratsuka, JP· patent location history

2021Patents assigned to RICOH CO LTD (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
KOMATSU MFG CO LTD	11	1982–2021
NIPPON OIL CO LTD	10	1978–1983
CANON KK	8	1997–2001
RICOH CO LTD	2	2021
AERO SPEC PRODUCTS CO LTD	1	1978

Locations

Location	Patents	Span
Tokyo, JP	9	1978–1983
Hiratsuka, JP	8	2016–2021
Urawa, JP	5	1991–2001
Kashiwa, JP	4	2000–2001
Kanagawa, JP	3	1989–2021