Inventor

Yoshiyuki Umemoto

Inventor

Tokyo, JP

Overview

12→

Patents

1986–2021

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 12 as inventor

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

F02Bprimary

F02BInternal-combustion piston engines20%

F02DControlling combustion engines14%

B63HMarine propulsion or steering9%

H10FInorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation9%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution9%

Y02TClimate change mitigation technologies related to transportation9%

F04BPositive-displacement machines for liquids6%

F15BSystems acting by means of fluids in general6%

B25BTools or bench devices not otherwise provided for, for fastening, connecting, disengaging, or holding3%

C22CAlloys3%

PatentTitleYear

11,131,254Marine engine2021 11,105,281Marine engine2021 11,053,865Compression ratio control device and engine2021 10,689,743Piston ring2020 10,502,120Uniflow-scavenged two-cycle engine2019 10,087,831Engine2018 9,605,590'Crosshead engine'2017 9,476,353'Two-cycle engine and method for lubricating two-cycle engine'2016 6,053,080'Device for tightening bolt and/or nut'2000 4,853,043'Solar battery for time piece'1989 4,776,896'Amorphous silicon solar battery'1988 4,570,030'Solar cell device'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–1989Patents assigned to FUJI ELECTRIC CO LTD (3)· patent assignee history

1986–1989Based in Kanagawa, JP· patent location history

2000Patents assigned to MAEDA METAL IND (1)· patent assignee history

2016–2021Patents assigned to IHI CORP (8)· patent assignee history

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

2017–2018Based in Aioi, JP· patent location history

2019Based in Tatsuno-machi, JP· patent location history

2020Patents assigned to IHI POWER SYSTEMS CO LTD (1)· patent assignee history

2021Based in Hyogo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
IHI CORP	8	2016–2021
FUJI ELECTRIC CO LTD	3	1986–1989
IHI POWER SYSTEMS CO LTD	1	2020
MAEDA METAL IND	1	2000

Locations

Location	Patents	Span
Tokyo, JP	3	2016–2021
Hyogo, JP	2	2021
Aioi, JP	2	2017–2018
Kanagawa, JP	2	1986–1989
Tatsuno-machi, JP	1	2019