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Inventor

Tomoyuki Fujita

Inventor
Tokyo, JP

Overview

51→
Patents
1993–2020
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 51 as inventor

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

F04Cprimary
F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids21%
F01CRotary-piston or oscillating-piston machines or engines12%
C07CAcyclic or carbocyclic compounds5%
D05BSewing5%
C08JWorking-up3%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients3%
F16HGearing3%
G02BOptical elements, systems or apparatus3%
H01FMagnets3%
H04LTransmission of digital information, e.g. telegraphic communication3%
PatentTitleYear
10,690,872Optical fiber protection structure and optical combiner structure using the same202010,675,194Absorbent article202010,627,573Optical device, laser system, and method for manufacturing optical device202010,073,220Optical coupler, laser device, and taper fiber20189,995,301Vane pump and vane pump manufacturing method20189,897,086'Vane pump'20189,879,670'Variable displacement vane pump'20189,856,873'Vane pump'20189,745,241'Production method for hexachloroacetone'20179,719,404'Muffler and its corresponding manufacturing method'20179,664,188'Variable displacement vane pump'20179,644,626'Vane pump'20179,617,379'Production method for carbonate compound and methacrylate or ester thereof'20179,611,848'Variable displacement vane pump having connection groove communicating with suction-side back pressure port thereof'20179,598,345'Method for producing unsaturated acid ester or unsaturated acid'20179,581,159'Electric oil pump'20179,567,997'Variable capacity type vane pump'20179,534,595'Variable displacement vane pump'20179,488,175'Variable capacity type vane pump'20169,482,228'Variable capacity vane pump with a rotor and a cam ring rotatable eccentrically relative to a center of the rotor'20169,468,556'Deformed nail corrector'20169,366,251'Vane pump with a vane ring, a vane ring housing chamber and vane ring opposite pressure chambers'20169,270,554'Communication apparatus and delay detecting method'20169,238,612'Method for producing unsaturated acid and/or unsaturated acid ester'20168,952,083'Fluorocopolymer composition and its production process'20158,933,264'Method for producing organic compound having sulfo group, method for producing liquid composition, and method for hydrolyzing organic compound having fluorosulfonyl group'20158,469,334'Solenoid actuator'20138,458,902'Method of forming cam shaft'20138,444,242'Ink refilling device'2013D0681172'Automatic drain valve'20138,426,527'Crosslinkable fluororubber composition and crosslinked rubber article'20138,348,646'Variable displacement vane pump'20138,342,817'Variable displacement vane pump'20138,342,826'Variable capacity vane pump'20138,187,136'Differential gear'20128,081,053'Solenoid actuator'20118,074,427'Production method for container packing filler and tubular net rolling apparatus'20118,058,973'Radio frequency identification system and method'20117,973,627'Solenoid actuator'20117,873,169'Methods, devices and systems for generating anonymous public keys in a secure communication system'20117,841,846'Vane pump with improved internal port placement'20107,802,973'Compact vane pump with mixed suction and return flows'20107,347,677'Vane pump'20087,314,359'Vane pump for continuously variable transmission'20087,243,672'Flow control valve'20077,060,744'Phosphazene composition'20065,974,996'Electronically controlled sewing system'19995,778,810'Sewing machine'19985,339,758'Remaining bobbin-thread amount measuring apparatus for sewing machine'19945,322,029'Remaining bobbin-thread amount measuring apparatus for sewing machine'19945,229,949'Sewing management system for a plurality of sewing machines'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993–2013Based in Tajimi, JP· patent location history
2007–2018Patents assigned to KAYABA INDUSTRY CO LTD (22)· patent assignee history
2007–2017Based in Tokyo, JP· patent location history
2010–2017Based in Kani, JP· patent location history
2011–2016Patents assigned to FUJITA TOMOYUKI (14)· patent assignee history
2011–2013Patents assigned to AKATSUKA KOICHIRO (5)· patent assignee history
2013–2017Patents assigned to ASAHI GLASS CO LTD (7)· patent assignee history
2016–2018Patents assigned to KYB CORP (13)· patent assignee history
2017–2018Based in Gifu, JP· patent location history
2018–2020Based in Sakura, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
KAYABA INDUSTRY CO LTD222007–2018
FUJITA TOMOYUKIself142011–2016
KYB CORP132016–2018
ASAHI GLASS CO LTD72013–2017
AKATSUKA KOICHIRO52011–2013
Locations
LocationPatentsSpan
Tokyo, JP122007–2017
Kani, JP92010–2017
Gifu, JP82017–2018
Tajimi, JP61993–2013
Sakura, JP32018–2020