P

Inventor

YAMASHITA MASAAKI

JP67 patents
⚠️ This page may combine multiple inventors who share the name “YAMASHITA MASAAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NIPPON KOKAN KK

27 patents
US6562474B1May 13, 2003

Coated steel sheet having excellent corrosion resistance and method for producing the same

NIPPON KOKAN KK97 citations97
US4775600AOct 4, 1988

Highly corrosion-resistant surface-treated steel plate

NIPPON KOKAN KK62 citations95
US4659394AApr 21, 1987

Process for preparation of highly anticorrosive surface-treated steel plate

NIPPON KOKAN KK55 citations94
US4411964AOct 25, 1983

Composite coating steel sheets having good corrosion resistance paintability and corrosion resistance after paint coating

NIPPON KOKAN KK58 citations94
US4407899AOct 4, 1983

Surface treated steel sheets for paint coating

NIPPON KOKAN KK56 citations94
US6677053B2Jan 13, 2004

Surface-treated steel sheet and production method therefor

NIPPON KOKAN KK22 citations92
US6509099B1Jan 21, 2003

Phosphate-treated steel plate

NIPPON KOKAN KK47 citations92
US5496652AMar 5, 1996

Zinc-plated steel plate having resin coating film

NIPPON KOKAN KK26 citations92
US5387473AFeb 7, 1995

Weldable black steel sheet with low-gloss appearance

NIPPON KOKAN KK51 citations92
US6610422B1Aug 26, 2003

Coated steel sheet and method for manufacturing the same

NIPPON KOKAN KK52 citations91
US4889775ADec 26, 1989

Highly corrosion-resistant surface-treated steel plate

NIPPON KOKAN KK31 citations91
US5429880AJul 4, 1995

Organic composite coated steel sheet and a process for manufacturing the same

NIPPON KOKAN KK22 citations90
US6797411B2Sep 28, 2004

Galvanized steel sheet, method for manufacturing the same, and method for manufacturing press-formed product

NIPPON KOKAN KK15 citations82
US6617048B1Sep 9, 2003

Prepainted steel sheet and method for producing the same

NIPPON KOKAN KK9 citations73
US6280535B2Aug 28, 2001

Manufacturing process on chromate-coated lead-containing galvanized steel sheet with anti-black patina property and anti-white rust property

NIPPON KOKAN KK12 citations73
US5795660AAug 18, 1998

Organic composite coated steel sheet having a high corrosion resistance in a rust-contaminated environment

NIPPON KOKAN KK14 citations73
US5641578AJun 24, 1997

Weldable black steel sheet

NIPPON KOKAN KK13 citations73
US5393605AFeb 28, 1995

Zinciferous plated steel sheet excellent in press-formability and corrosion resistance

NIPPON KOKAN KK9 citations73
US5110689AMay 5, 1992

Multi-layered steel sheets

NIPPON KOKAN KK8 citations73
US4970126ANov 13, 1990

Highly corrosion-resistant, multi-layer coated steel sheets

NIPPON KOKAN KK15 citations73
US4450209AMay 22, 1984

Multi-layer surface-treated steel plate having zinc-containing layer

NIPPON KOKAN KK16 citations73
US6699592B2Mar 2, 2004

Galvannealed steel sheet and method for manufacturing the same

NIPPON KOKAN KK6 citations72
US6015628AJan 18, 2000

Organic composite coated steel sheet with good press formability and perforation corrosion resistance

NIPPON KOKAN KK12 citations72
US6136455AOct 24, 2000

Coating composition for precoated steel sheet, precoated steel sheet, and process for preparing the same

NIPPON KOKAN KK12 citations71
US4971636ANov 20, 1990

Method of producing highly corrosion-resistant surface-treated steel plates

NIPPON KOKAN KK11 citations69
US5997664ADec 7, 1999

Method for producing galvanized steel sheet

NIPPON KOKAN KK4 citations63
US5846660ADec 8, 1998

Organic composite coated steel plate

NIPPON KOKAN KK6 citations63

YANMAR CO LTD

6 patents

JFE STEEL CORP

5 patents

PFU LTD

5 patents

YOSHIDA SHOJI

2 patents

TDK CORP

2 patents

SAKAMOTO KUNIHIKO

1 patent

YAMASHITA MASAAKI

1 patent

(unassigned)

1 patent

Showing the top 50 of 67 patents by PatentIndex Score.