Inventor

Yoshitoshi Hagiwara

Inventor

Saitama, JP

Overview

9→

Patents

1976–2011

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 9 as inventor

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

Y10Tprimary

Y10TTechnical subjects covered by former us classification24%

F16DCouplings for transmitting rotation19%

C22CAlloys14%

C22FChanging the physical structure of non-ferrous metals and non-ferrous alloys10%

B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material5%

B60BVehicle wheels5%

F01LCyclically operating valves for machines or engines5%

F02FCylinders, pistons or casings, for combustion engines5%

F05CIndexing scheme relating to materials, material properties or material characteristics for machines, engines or pumps other than non-positive-displacement machines or engines5%

F16HGearing5%

PatentTitleYear

8,046,916'Method of, and apparatus for, manufacturing metallic bellows'2011 6,139,659'Titanium alloy made brake rotor and its manufacturing method'2000 6,110,303'Titanium alloy made brake rotor and its manufacturing method'2000 6,068,094'Sintered friction material'2000 5,922,452'Titanium and/or titanium alloy sintered friction material'1999 4,959,276'Heat-resistant, wear-resistant and high-strength Al-Si alloy, and cylinder liner employing same'1990 4,781,660'V-pulley for a continuously variable transmission'1988 4,527,839'Synthetic wheel formed from two halves'1985 3,982,905'Porous valve seat materials for internal combustion engines'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2000Patents assigned to HONDA MOTOR CO LTD (8)· patent assignee history

1976Based in Niiza, JP· patent location history

1985–2000Based in Saitama, JP· patent location history

1990–2000Patents assigned to SUMITOMO ELECTRIC INDUSTRIES (3)· patent assignee history

1990Based in Tokyo, JP· patent location history

1999–2000Based in Wako, JP· patent location history

2011Patents assigned to YUTAKA GIKEN CO LTD (1)· patent assignee history

2011Based in Shizuoka, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HONDA MOTOR CO LTD	8	1976–2000
SUMITOMO ELECTRIC INDUSTRIES	3	1990–2000
YUTAKA GIKEN CO LTD	1	2011

Locations

Location	Patents	Span
Saitama, JP	4	1985–2000
Wako, JP	2	1999–2000
Shizuoka, JP	1	2011
Tokyo, JP	1	1990
Niiza, JP	1	1976