for springs

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CPC
C21D9/02

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CCHEMISTRY METALLURGY C21Iron metallurgy C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS C21D9/00Heat treatment

Current Industry

C21D9/02for springs

Industries

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Patents Grantslast 30 patents

Information Patent Grant
Damper spring
- Patent number 12,181,012
- Issue date Dec 31, 2024
- Nippon Steel Corporation
- Shinya Teramoto
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Hollow spring and method of manufacturing the same
- Patent number 12,135,068
- Issue date Nov 5, 2024
- Mitsubishi Steel Mfg. Co., Ltd.
- Hironobu Sayama
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Steel wire and spring
- Patent number 12,091,734
- Issue date Sep 17, 2024
- Sumitomo Electric Industries, Ltd.
- Tetsuya Nakajima
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Valve spring
- Patent number 12,006,994
- Issue date Jun 11, 2024
- Nippon Steel Corporation
- Shinya Teramoto
- C21 - METALLURGY OF IRON
Information Patent Grant
Softening method for high-strength Q and P steel hot roll
- Patent number 11,981,972
- Issue date May 14, 2024
- BAOSTEEL ZHANJIAN IRON & STEEL CO., LTD.
- Xingjian Gao
- C21 - METALLURGY OF IRON
Information Patent Grant
Steel wire
- Patent number 11,952,650
- Issue date Apr 9, 2024
- Nippon Steel Corporation
- Shinya Teramoto
- C21 - METALLURGY OF IRON
Information Patent Grant
Titanium copper foil, extended copper article, electronic device co...
- Patent number 11,739,397
- Issue date Aug 29, 2023
- JX Nippon Mining & Metals Corporation
- Kenta Tsujie
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of manufacturing a hollow spring member
- Patent number 11,701,943
- Issue date Jul 18, 2023
- NHK Spring Co., Ltd.
- Masahiro Umezawa
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Canted coil spring and connector
- Patent number 11,674,193
- Issue date Jun 13, 2023
- Sumitomo Electric Industries, Ltd.
- Takumi Akada
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Nitrogen-containing microalloyed spring steel and preparation metho...
- Patent number 11,466,334
- Issue date Oct 11, 2022
- Shandong Automobile Spring Factory Zibo Co., Ltd.
- Simon Yisheng Feng
- C21 - METALLURGY OF IRON
Information Patent Grant
Device and method for detecting heating treatment temperatures of d...
- Patent number 11,453,928
- Issue date Sep 27, 2022
- Guangzhou Lianrou Machinery & Equipment Co., Ltd.
- Zhiming Tan
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Spring and manufacture method thereof
- Patent number 11,378,147
- Issue date Jul 5, 2022
- NHK Spring Co., Ltd.
- Takeshi Suzuki
- C21 - METALLURGY OF IRON
Information Patent Grant
Steel wire for spring
- Patent number 11,143,257
- Issue date Oct 12, 2021
- Sumitomo Electric Industries, Ltd.
- Takafumi Uwano
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Stabilizer
- Patent number 11,111,554
- Issue date Sep 7, 2021
- NHK Spring Co., Ltd.
- Shinichiro Kuwatsuka
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Rust-proof firearm springs
- Patent number 11,098,390
- Issue date Aug 24, 2021
- Edgar E. Weil
- F41 - WEAPONS
Information Patent Grant
Heat treatment of helical springs or similarly shaped articles by e...
- Patent number 11,044,788
- Issue date Jun 22, 2021
- Radyne Corporation
- Jerry G. Warner
- C21 - METALLURGY OF IRON
Information Patent Grant
Production method for stabilizers
- Patent number 10,995,382
- Issue date May 4, 2021
- NHK Spring Co., Ltd.
- Shinichiro Kuwatsuka
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Method of heat-treating additively manufactured ferromagnetic compo...
- Patent number 10,946,444
- Issue date Mar 16, 2021
- General Electric Company
- Francis Johnson
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Hollow spring member and hollow spring member production method
- Patent number 10,900,112
- Issue date Jan 26, 2021
- NHK Spring Co., Ltd.
- Morimichi Kai
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Spring steel wire and spring
- Patent number 10,844,920
- Issue date Nov 24, 2020
- Nippon Steel Corporation
- Shinya Teramoto
- C21 - METALLURGY OF IRON
Information Patent Grant
Spiral timepiece spring
- Patent number 10,795,317
- Issue date Oct 6, 2020
- Nivarox-Far S.A.
- Christian Charbon
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of manufacturing a spring with improved thermal stabilization
- Patent number 10,774,410
- Issue date Sep 15, 2020
- MICROTECNICA S.R.L.
- Dario Savino
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Oil tempered wires
- Patent number 10,760,028
- Issue date Sep 1, 2020
- Sumitomo Electric Industries, Ltd
- Takafumi Uwano
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
High strength spring, method of manufacturing the same, steel for h...
- Patent number 10,752,971
- Issue date Aug 25, 2020
- Mitsubishi Steel Mfg. Co., Ltd.
- Motoki Watanabe
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Spring steel
- Patent number 10,724,125
- Issue date Jul 28, 2020
- Nippon Steel Corporation
- Takahisa Suzuki
- C21 - METALLURGY OF IRON
Information Patent Grant
Ferritic stainless steel and heat-resistant member
- Patent number 10,689,723
- Issue date Jun 23, 2020
- Daido Steel Co., Ltd.
- Yoshihiko Koyanagi
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Ultra-high-strength spring steel for valve spring
- Patent number 10,689,736
- Issue date Jun 23, 2020
- Hyundai Motor Company
- Sung Chul Cha
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Method for producing hot-formed steel springs
- Patent number 10,689,726
- Issue date Jun 23, 2020
- Thyssenkrupp Federn und Stabilisatoren GmbH
- Dieter Lechner
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Carburization device and carburization method
- Patent number 10,584,408
- Issue date Mar 10, 2020
- National University Corporation Yokohama National University
- Wataru Nakao
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of manufacturing a suspension coil spring
- Patent number 10,583,706
- Issue date Mar 10, 2020
- NHK Spring Co., Ltd.
- Akira Tange
- B60 - VEHICLES IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
ULTRA-HIGH STRENGTH SPRING STEEL AND PREPARATION METHOD THEREOF
- Publication number 20240392404
- Publication date Nov 28, 2024
- Shandong Jianzhu University
- Simon Yisheng Feng
- B22 - CASTING POWDER METALLURGY
Information Patent Application
STEEL WIRE AND SPRING
- Publication number 20240209481
- Publication date Jun 27, 2024
- Sumitomo Electric Industries, Ltd.
- Taichi OKADA
- C21 - METALLURGY OF IRON
Information Patent Application
VALVE SPRING
- Publication number 20240077123
- Publication date Mar 7, 2024
- NIPPON STEEL CORPORATION
- Shinya TERAMOTO
- C21 - METALLURGY OF IRON
Information Patent Application
STEEL WIRE
- Publication number 20230392244
- Publication date Dec 7, 2023
- NIPPON STEEL CORPORATION
- Shinya TERAMOTO
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
STEEL FOR LEAF SPRINGS OF AUTOMOBILES AND A METHOD OF MANUFACTURING...
- Publication number 20230340631
- Publication date Oct 26, 2023
- ARCELORMITTAL
- Jean-Michel JACHMICH
- C21 - METALLURGY OF IRON
Information Patent Application
DAMPER SPRING
- Publication number 20230296152
- Publication date Sep 21, 2023
- NIPPON STEEL CORPORATION
- Shinya TERAMOTO
- C21 - METALLURGY OF IRON
Information Patent Application
AUSTENITIC STAINLESS STEEL AND SPRING
- Publication number 20230160045
- Publication date May 25, 2023
- NIPPON STEEL STAINLESS STEEL CORPORATION
- Kotaro SEKIMUKAI
- C21 - METALLURGY OF IRON
Information Patent Application
STEEL WIRE AND SPRING
- Publication number 20220307115
- Publication date Sep 29, 2022
- Sumitomo Electric Industries, Ltd.
- Tetsuya NAKAJIMA
- C21 - METALLURGY OF IRON
Information Patent Application
WIRE ROD AND STEEL WIRE FOR HIGH STRENGTH SPRING, AND MANUFACTURING...
- Publication number 20220251675
- Publication date Aug 11, 2022
- POSCO
- Jun Mo Lee
- C21 - METALLURGY OF IRON
Information Patent Application
METHOD FOR MAKING A SPRING CORE FOR A MATTRESS OR FOR SEATING PRODUCTS
- Publication number 20220226880
- Publication date Jul 21, 2022
- N.V. BEKAERT S.A.
- Bert VANDERBEKEN
- B68 - SADDLERY UPHOLSTERY
Information Patent Application
TITANIUM COPPER FOIL, EXTENDED COPPER ARTICLE, ELECTRONIC DEVICE CO...
- Publication number 20210371957
- Publication date Dec 2, 2021
- JX NIPPON MINING & METALS CORPORATION
- Kenta Tsujie
- C21 - METALLURGY OF IRON
Information Patent Application
METHOD OF HEAT-TREATING ADDITIVELY MANUFACTURED FERROMAGNETIC COMPO...
- Publication number 20210197273
- Publication date Jul 1, 2021
- GENERAL ELECTRIC COMPANY
- Francis Johnson
- B22 - CASTING POWDER METALLURGY
Information Patent Application
WIRE ROD AND STEEL WIRE FOR SPRING, HAVING ENHANCED TOUGHNESS AND C...
- Publication number 20210180152
- Publication date Jun 17, 2021
- Kwan Ho Kim
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
SPRING STEEL HAVING SUPERIOR FATIGUE LIFE, AND MANUFACTURING METHOD...
- Publication number 20210164078
- Publication date Jun 3, 2021
- Baoshan Iron & Steel Co., Ltd
- Zan YAO
- C21 - METALLURGY OF IRON
Information Patent Application
SOFTENING METHOD FOR HIGH-STRENGTH Q&P STEEL HOT ROLL
- Publication number 20200270714
- Publication date Aug 27, 2020
- BAOSTEEL ZHANJIANG IRON & STEEL CO., LTD
- Xingjian GAO
- C21 - METALLURGY OF IRON
Information Patent Application
HELICAL COMPRESSION SPRING AND METHOD FOR PRODUCING SAME
- Publication number 20200240487
- Publication date Jul 30, 2020
- NHK Spring Co., Ltd.
- Toshiyuki AKANUMA
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
DEVICE AND METHOD FOR DETECTING HEATING TREATMENT TEMPERATURES OF D...
- Publication number 20200199707
- Publication date Jun 25, 2020
- GUANGZHOU LIANROU MACHINERY & EQUIPMENT CO., LTD.
- Zhiming Tan
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
NITROGEN-CONTAINING MICROALLOYED SPRING STEEL AND PREPARATION METHO...
- Publication number 20200190614
- Publication date Jun 18, 2020
- Shandong Automobile Spring Factory Zibo Co.,Ltd.
- Simon Yisheng FENG
- C21 - METALLURGY OF IRON
Information Patent Application
METHOD OF PRODUCING COIL SPRING
- Publication number 20200141463
- Publication date May 7, 2020
- NHK SPRING CO., LTD.
- Masaru Matsubara
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
CANTED COIL SPRING AND CONNECTOR
- Publication number 20200080166
- Publication date Mar 12, 2020
- Sumitomo Electric Industries, Ltd.
- Takumi AKADA
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
WIRE ROD FOR SPRINGS WITH EXCELLENT CORROSION FATIGUE RESISTANCE, S...
- Publication number 20200063228
- Publication date Feb 27, 2020
- POSCO
- Kwan-Ho Kim
- C21 - METALLURGY OF IRON
Information Patent Application
SPRING AND MANUFACTURE METHOD THEREOF
- Publication number 20190390727
- Publication date Dec 26, 2019
- NHK Spring Co., Ltd.
- Takeshi SUZUKI
- C21 - METALLURGY OF IRON
Information Patent Application
Electric Induction System and Method for Metallurgically Heat Treat...
- Publication number 20190352732
- Publication date Nov 21, 2019
- INDUCTOHEAT, INC.
- Timothy Gerard BOUSSIE
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
AN OBJECT COMPRISING A DUPLEX STAINLESS STEEL AND THE USE THEREOF
- Publication number 20190323110
- Publication date Oct 24, 2019
- Sandvik Intellectual Property AB
- Tomas FORSMAN
- C21 - METALLURGY OF IRON
Information Patent Application
Timepiece Resonator
- Publication number 20190265651
- Publication date Aug 29, 2019
- RICHEMONT INTERNATIONAL S.A.
- Stéphane Pommier
- G04 - HOROLOGY
Information Patent Application
STEEL WIRE FOR SPRING, SPRING, METHOD FOR MANUFACTURING STEEL WIRE...
- Publication number 20190233912
- Publication date Aug 1, 2019
- Sumitomo Electric Industries, Ltd.
- Fuminori Okada
- C21 - METALLURGY OF IRON
Information Patent Application
METHOD OF MANUFACTURING A SUSPENSION COIL SPRING
- Publication number 20190126706
- Publication date May 2, 2019
- NHK Spring Co., Ltd.
- Akira TANGE
- B60 - VEHICLES IN GENERAL
Information Patent Application
HOLLOW SPRING MEMBER AND HOLLOW SPRING MEMBER PRODUCTION METHOD
- Publication number 20190032191
- Publication date Jan 31, 2019
- NHK Spring Co., Ltd.
- Morimichi KAI
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
HIGH STRENGTH SPRING, METHOD OF MANUFACTURING THE SAME, STEEL FOR H...
- Publication number 20190032165
- Publication date Jan 31, 2019
- MITSUBISSHI STEEL, MFG. CO., LTD.
- Motoki WATANABE
- C21 - METALLURGY OF IRON
Information Patent Application
SPIRAL TIMEPIECE SPRING
- Publication number 20180373202
- Publication date Dec 27, 2018
- Nivarox-Far S.A.
- Christian CHARBON
- C21 - METALLURGY OF IRON

for springs

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Damper spring

Hollow spring and method of manufacturing the same

Steel wire and spring

Valve spring

Softening method for high-strength Q and P steel hot roll

Steel wire

Titanium copper foil, extended copper article, electronic device co...

Method of manufacturing a hollow spring member

Canted coil spring and connector

Nitrogen-containing microalloyed spring steel and preparation metho...

Device and method for detecting heating treatment temperatures of d...

Spring and manufacture method thereof

Steel wire for spring

Stabilizer

Rust-proof firearm springs

Heat treatment of helical springs or similarly shaped articles by e...

Production method for stabilizers

Method of heat-treating additively manufactured ferromagnetic compo...

Hollow spring member and hollow spring member production method

Spring steel wire and spring

Spiral timepiece spring

Method of manufacturing a spring with improved thermal stabilization

Oil tempered wires

High strength spring, method of manufacturing the same, steel for h...

Spring steel

Ferritic stainless steel and heat-resistant member

Ultra-high-strength spring steel for valve spring

Method for producing hot-formed steel springs

Carburization device and carburization method

Method of manufacturing a suspension coil spring

Patents Applicationslast 30 patents

ULTRA-HIGH STRENGTH SPRING STEEL AND PREPARATION METHOD THEREOF

STEEL WIRE AND SPRING

VALVE SPRING

STEEL WIRE

STEEL FOR LEAF SPRINGS OF AUTOMOBILES AND A METHOD OF MANUFACTURING...

DAMPER SPRING

AUSTENITIC STAINLESS STEEL AND SPRING

STEEL WIRE AND SPRING

WIRE ROD AND STEEL WIRE FOR HIGH STRENGTH SPRING, AND MANUFACTURING...

METHOD FOR MAKING A SPRING CORE FOR A MATTRESS OR FOR SEATING PRODUCTS

TITANIUM COPPER FOIL, EXTENDED COPPER ARTICLE, ELECTRONIC DEVICE CO...

METHOD OF HEAT-TREATING ADDITIVELY MANUFACTURED FERROMAGNETIC COMPO...

WIRE ROD AND STEEL WIRE FOR SPRING, HAVING ENHANCED TOUGHNESS AND C...

SPRING STEEL HAVING SUPERIOR FATIGUE LIFE, AND MANUFACTURING METHOD...

SOFTENING METHOD FOR HIGH-STRENGTH Q&P STEEL HOT ROLL

HELICAL COMPRESSION SPRING AND METHOD FOR PRODUCING SAME

DEVICE AND METHOD FOR DETECTING HEATING TREATMENT TEMPERATURES OF D...

NITROGEN-CONTAINING MICROALLOYED SPRING STEEL AND PREPARATION METHO...

METHOD OF PRODUCING COIL SPRING

CANTED COIL SPRING AND CONNECTOR

WIRE ROD FOR SPRINGS WITH EXCELLENT CORROSION FATIGUE RESISTANCE, S...

SPRING AND MANUFACTURE METHOD THEREOF

Electric Induction System and Method for Metallurgically Heat Treat...

AN OBJECT COMPRISING A DUPLEX STAINLESS STEEL AND THE USE THEREOF

Timepiece Resonator

STEEL WIRE FOR SPRING, SPRING, METHOD FOR MANUFACTURING STEEL WIRE...

METHOD OF MANUFACTURING A SUSPENSION COIL SPRING

HOLLOW SPRING MEMBER AND HOLLOW SPRING MEMBER PRODUCTION METHOD

HIGH STRENGTH SPRING, METHOD OF MANUFACTURING THE SAME, STEEL FOR H...

SPIRAL TIMEPIECE SPRING