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Inventor

Isao Sumiyoshi

Inventor
Yokohama, JP

Overview

4→
Patents
2012–2016
Patent span
Chemistry
Primary field (CPC C)

Patents· 4 as inventor

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

C21Dprimary
C21DModifying the physical structure of ferrous metals27%
F16FSprings27%
Y10TTechnical subjects covered by former us classification27%
B24CAbrasive or related blasting with particulate material9%
C22CAlloys9%
PatentTitleYear
9,404,547'Steel for high-strength spring, method for producing same, and high-strength spring'20168,533,954'Method for manufacturing a coil spring for vehicle suspension'20138,308,150'Coil spring for vehicle suspension and method for manufacturing the same'20128,297,092'Reflection member for shot peening and shot peening method having the same'2012

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2012–2016Patents assigned to NHK SPRING CO LTD (4)· patent assignee history
2012–2013Patents assigned to SUMIYOSHI ISAO (3)· patent assignee history
2012–2013Patents assigned to TANGE AKIRA (3)· patent assignee history
2012–2013Patents assigned to OKADA HIDEKI (2)· patent assignee history
2012–2013Patents assigned to SUGIYAMA MITSUHIRO (2)· patent assignee history
2012–2016Based in Yokohama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NHK SPRING CO LTD42012–2016
SUMIYOSHI ISAOself32012–2013
TANGE AKIRA32012–2013
OKADA HIDEKI22012–2013
SUGIYAMA MITSUHIRO22012–2013
Locations
LocationPatentsSpan
Yokohama, JP42012–2016