Inventor

Yorishige Maeda

Inventor

Toyota, JP

Overview

16→

Patents

1977–2021

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 16 as inventor

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

F16Jprimary

F16JPistons23%

F02BInternal-combustion piston engines13%

F05CIndexing scheme relating to materials, material properties or material characteristics for machines, engines or pumps other than non-positive-displacement machines or engines13%

C22CAlloys10%

F02FCylinders, pistons or casings, for combustion engines10%

Y02TClimate change mitigation technologies related to transportation7%

B22FWorking metallic powder3%

F01LCyclically operating valves for machines or engines3%

F01MLubricating of machines or engines in general3%

F16CShafts3%

PatentTitleYear

10,998,130Coil component having resin walls2021 5,123,386'Internal combustion engine and its piston'1992 5,039,116'Composite oil-ring'1991 4,985,092'Steel having good wear resistance'1991 4,966,751'Steel having good wear resistance'1990 4,899,702'Aluminum alloy piston and piston-ring assembly treated to suppress agglutination of the piston alloy to a piston-ring'1990 4,798,391'Three-piece oil-ring with a slot'1989 4,730,548'Light metal alloy piston'1988 4,722,535'Oil ring structure having reduced rigidity'1988 4,669,367'Light metal alloy piston'1987 4,659,093'Three-piece oil-ring with an inward protrusion'1987 4,548,416'Oil-ring including two rail rings and an expander-spacer ring which bites into the rail ring'1985 4,467,749'Flow control device of a helically-shaped intake port'1984 4,344,407'Cylinder head, ports, and piston configuration'1982 4,199,202'Bearing structure for a cam shaft in internal combustion engines'1980 4,033,196'Timing belt tensioner'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1992Patents assigned to TOYOTA MOTOR CO LTD (15)· patent assignee history

1977–1992Based in Toyota, JP· patent location history

1988Patents assigned to AISIN SEIKI (1)· patent assignee history

1988Patents assigned to RIKEN KK (1)· patent assignee history

1990–1991Patents assigned to AICHI STEEL WORKS LTD (2)· patent assignee history

2021Patents assigned to TDK CORP (1)· patent assignee history

2021Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TOYOTA MOTOR CO LTD	15	1977–1992
AICHI STEEL WORKS LTD	2	1990–1991
AISIN SEIKI	1	1988
RIKEN KK	1	1988
TDK CORP	1	2021

Locations

Location	Patents	Span
Toyota, JP	15	1977–1992
Tokyo, JP	1	2021