Kazuo Koyama

Person

Futtsu, JP

People

Patents Grantslast 30 patents

Information Patent Grant
High-strength cold rolled steel sheet and high-strength plated stee...
- Patent number 6,129,992
- Issue date Oct 10, 2000
- Nippon Steel Corporation
- Yasuharu Sakuma
- C21 - METALLURGY OF IRON
Information Patent Grant
Cold rolled steel sheet and galvanized steel sheet having improved...
- Patent number 5,954,896
- Issue date Sep 21, 1999
- Nippon Steel Corporation
- Kazuo Koyama
- C21 - METALLURGY OF IRON
Information Patent Grant
Twin-roll continuous casting method
- Patent number 5,901,777
- Issue date May 11, 1999
- Nippon Steel Corporation
- Yoshikazu Matsumura
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
High-strength steel sheet suitable for deep drawing and process for...
- Patent number 5,618,355
- Issue date Apr 8, 1997
- Nippon Steel Corporation
- Kazuo Koyama
- C21 - METALLURGY OF IRON
Information Patent Grant
Continuously cast slab of extremely low carbon steel with less surf...
- Patent number 5,578,143
- Issue date Nov 26, 1996
- Nippon Steel Corporation
- Kazuo Koyama
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Building low yield ratio hot-dip galvanized cold rolled steel sheet...
- Patent number 5,156,690
- Issue date Oct 20, 1992
- Nippon Steel Corporation
- Hirohide Asano
- C21 - METALLURGY OF IRON
Information Patent Grant
Process for producing cold rolled steel sheets having excellent pre...
- Patent number 4,981,531
- Issue date Jan 1, 1991
- Nippon Steel Corporation
- Hiroshi Katoh
- C21 - METALLURGY OF IRON
Information Patent Grant
Process for producing cold-rolled high strength steel sheet having...
- Patent number 4,956,025
- Issue date Sep 11, 1990
- Nippon Steel Corporation
- Kazuo Koyama
- C21 - METALLURGY OF IRON
Information Patent Grant
One-sided enamelable hot-rolled steel sheet and process for produci...
- Patent number 4,801,341
- Issue date Jan 31, 1989
- Nippon Steel Corporation
- Atsushi Itami
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process for producing hot-rolled steel sheet having high r value
- Patent number 4,769,088
- Issue date Sep 6, 1988
- Nippon Steel Corporation
- Atsushi Itami
- C21 - METALLURGY OF IRON
Information Patent Grant
Process for producing cold rolled steel sheets having excellent pre...
- Patent number 4,443,272
- Issue date Apr 17, 1984
- Nippon Steel Corporation
- Hiroshi Katoh
- C21 - METALLURGY OF IRON
Information Patent Grant
Method for producing a dual-phase steel sheet having excellent form...
- Patent number 4,394,186
- Issue date Jul 19, 1983
- Nippon Steel Corporation
- Takashi Furukawa
- C21 - METALLURGY OF IRON
Information Patent Grant
Process for producing cold rolled steel strip having excellent mech...
- Patent number 4,391,653
- Issue date Jul 5, 1983
- Nippon Steel Corporation
- Hiroshi Takechi
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Method of producing dual phase structure cold rolled steel sheet
- Patent number 4,376,661
- Issue date Mar 15, 1983
- Nippon Steel Corporation
- Hiroshi Takechi
- C21 - METALLURGY OF IRON
Information Patent Grant
Process for producing high-strength, low yield ratio and high ducti...
- Patent number 4,285,741
- Issue date Aug 25, 1981
- Nippon Steel Corporation
- Takashi Furukawa
- C21 - METALLURGY OF IRON

Kazuo Koyama

Person

Patents Grantslast 30 patents

High-strength cold rolled steel sheet and high-strength plated stee...

Cold rolled steel sheet and galvanized steel sheet having improved...

Twin-roll continuous casting method

High-strength steel sheet suitable for deep drawing and process for...

Continuously cast slab of extremely low carbon steel with less surf...

Building low yield ratio hot-dip galvanized cold rolled steel sheet...

Process for producing cold rolled steel sheets having excellent pre...

Process for producing cold-rolled high strength steel sheet having...

One-sided enamelable hot-rolled steel sheet and process for produci...

Process for producing hot-rolled steel sheet having high r value

Process for producing cold rolled steel sheets having excellent pre...

Method for producing a dual-phase steel sheet having excellent form...

Process for producing cold rolled steel strip having excellent mech...

Method of producing dual phase structure cold rolled steel sheet

Process for producing high-strength, low yield ratio and high ducti...