Inventor
Hisashi Amaya
Inventor
Kyoto, JP
Overview
Patents· 25 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C22Cprimary
C22CAlloys38%
C21DModifying the physical structure of ferrous metals25%
Y10TTechnical subjects covered by former us classification8%
B23KSoldering or unsoldering5%
E21BEarth or rock drilling5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
B21BRolling of metal3%
B21CManufacture of metal sheets, wire, rods, tubes, profiles or like semi-manufactured products otherwise than by rolling3%
C22FChanging the physical structure of non-ferrous metals and non-ferrous alloys3%
F16LPipes3%
PatentTitleYear
10,995,394Steel bar for downhole member, and downhole member202110,000,832Duplex stainless steel20189,783,876'Stainless steel for oil wells and stainless steel pipe for oil wells'20179,771,628'Duplex stainless steel and production method therefor'20179,579,870'Welded joint of duplex stainless steel'20179,555,496'Process for producing welded joint using GMA welding and CO2 as a shielding gas'20179,322,087'Stainless steel for oil well, stainless steel pipe for oil well, and method of manufacturing stainless steel for oil well'20169,303,296'High-strength stainless steel for oil well and high-strength stainless steel pipe for oil well'20169,109,268'Stainless steel for oil well, stainless steel pipe for oil well, and method of manufacturing stainless steel for oil well'20159,090,957'Martensitic stainless steel oil country tubular good'20159,034,125'Method for manufacturing Ni base alloy pipe stock'20158,784,581'Fe-Ni alloy pipe stock and method for manufacturing the same'20148,701,455'Method for manufacturing a high alloy pipe'20148,608,872'High-strength stainless steel pipe excellent in sulfide stress cracking resistance and high-temperature carbonic-acid gas corrosion resistance'20138,163,233'Martensitic stainless steel for welded structures'20128,157,930'Martensitic stainless steel'20128,071,020'High strength Cr-Ni alloy material and seamless pipe for oil well'20117,767,039'Martensitic stainless steel'20107,458,426'Steel pipe for embedding-expanding, and method of embedding-expanding oil well steel pipe'20087,238,434'Welded structure having improved resistance to stress corrosion cracking'20077,225,868'Steel pipe for embedding-expanding, and method of embedding-expanding oil well steel pipe'20077,082,992'Oil well steel pipe for embedding-expanding'20066,440,234'Martensitic stainless steel products'20026,210,806'Martensitic stainless steel having oxide scale layers'20016,159,311'Martensitic stainless steel pipe and method for manufacturing the same'2000Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2000–2012Patents assigned to SUMITOMO METAL IND (11)· patent assignee history
2000–2016Based in Kyoto, JP· patent location history
2011–2018Patents assigned to AMAYA HISASHI (12)· patent assignee history
2012–2016Patents assigned to KONDO KUNIO (5)· patent assignee history
2012–2018Patents assigned to TAKABE HIDEKI (5)· patent assignee history
2013–2021Patents assigned to NIPPON STEEL & SUMITOMO METAL CORP (14)· patent assignee history
2015Based in Osaka, JP· patent location history
2017–2021Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NIPPON STEEL & SUMITOMO METAL CORP | 14 | 2013–2021 |
| AMAYA HISASHIself | 12 | 2011–2018 |
| SUMITOMO METAL IND | 11 | 2000–2012 |
| KONDO KUNIO | 5 | 2012–2016 |
| TAKABE HIDEKI | 5 | 2012–2018 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kyoto, JP | 18 | 2000–2016 |
| Tokyo, JP | 6 | 2017–2021 |
| Osaka, JP | 1 | 2015 |