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Inventor

Masaya Imai

Inventor
Ibaraki, JP

Overview

12→
Patents
1976–2021
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.

F01Cprimary
F01CRotary-piston or oscillating-piston machines or engines28%
F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids11%
G01NInvestigating or analysing materials by determining their chemical or physical properties11%
B60WConjoint control of vehicle sub-units of different type or different function6%
B62DMotor vehicles6%
F04BPositive-displacement machines for liquids6%
F16JPistons6%
G01GWeighing6%
G06KGraphical data reading6%
G06VImage or video recognition or understanding6%
PatentTitleYear
10,997,860Parking assistance device20215,132,919'Automatic measuring device for measuring the amount of wax, oil and other substances applied on the surface of a workpiece'1992RE033473'Oil feeding device for scroll fluid apparatus'19904,555,224'Oil feeding device for scroll fluid apparatus'19854,462,772'Oil feeding device for scroll fluid apparatus'19844,454,748'Apparatus for measuring the content of hydrogen dissolved in a molten metal'19844,406,602'Screw rotor with specific tooth profile'19834,401,420'Male and female screw rotor assembly with specific tooth flanks'19834,384,831'Scroll-type fluid apparatus provided with means for counteracting a moment exerted on orbiting scroll member'19834,350,479'Scrool-type fluid machine with liquid-filled force-balanced pockets'19824,145,059'Mechanical seal'19793,960,057'Hydraulic pump or motor'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976Patents assigned to HITACHI CONSTRUCTION MACHINERY (1)· patent assignee history
1976–2021Based in Tokyo, JP· patent location history
1979–1985Patents assigned to HITACHI LTD (7)· patent assignee history
1979–1990Based in Ibaraki, JP· patent location history
1983Based in Sakuramura, JP· patent location history
1984–1992Patents assigned to SUMITOMO LIGHT METAL IND (2)· patent assignee history
1984Based in Nagoya, JP· patent location history
1992Patents assigned to FUJI ELECTRIC CO LTD (1)· patent assignee history
1992Based in Konan, JP· patent location history
2021Patents assigned to HITACHI AUTOMOTIVE SYSTEMS LTD (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD71979–1985
SUMITOMO LIGHT METAL IND21984–1992
FUJI ELECTRIC CO LTD11992
HITACHI AUTOMOTIVE SYSTEMS LTD12021
HITACHI CONSTRUCTION MACHINERY11976
Locations
LocationPatentsSpan
Ibaraki, JP61979–1990
Tokyo, JP21976–2021
Sakuramura, JP21983
Konan, JP11992
Nagoya, JP11984