Inventor · disambiguated record
Masahiko Hamada
Also filed as: HAMADA MASAHIKO
21 granted patents·9 pending applications·376 citations·filing 1991–2020
95Inventor score
Top patents by PatentIndex Score
30 records- 0196US6183573B1High-toughness, high-tensile-strength steel and method of manufacturing the sameSUMITOMO METAL IND·Filed 2000·Granted Feb 6, 2001·78 cites·8 claims
- 0293US6379821B2Martensitic stainless steel welded pipeSUMITOMO METAL IND·Filed 2001·Granted Apr 30, 2002·39 cites·14 claims
- 0388US6245290B1High-tensile-strength steel and method of manufacturing the sameEXXONMOBIL UPSTREAM RES CO·Filed 1998·Granted Jun 12, 2001·52 cites·13 claims
- 0488US6188037B1Welded high-strength steel structures and method of manufacturing the sameSUMITOMO METAL IND·Filed 1998·Granted Feb 13, 2001·63 cites·6 claims
- 0587US8177925B2High-tensile steel plate, welded steel pipe or tube, and methods of manufacturing thereofTAKAHASHI NOBUAKI·Filed 2006·Granted May 15, 2012·9 cites·9 claims
- 0685US6953508B2High strength steel weld having improved resistance to cold cracking and a welding methodSUMITOMO METAL IND·Filed 2003·Granted Oct 11, 2005·22 cites·16 claims
- 0778US6796761B2Bolt and nutAOYAMA SEISAKUSHO·Filed 2002·Granted Sep 28, 2004·28 cites·20 claims
- 0874US5178243AHydraulic damperATSUGI UNISIA CORP·Filed 1991·Granted Jan 12, 1993·36 cites·13 claims
- 0971US7770428B2Hot bend pipe and a process for its manufactureSUMITOMO METAL IND·Filed 2009·Granted Aug 10, 2010·1 cites·18 claims
- 1066US9771628B2Duplex stainless steel and production method thereforMOTOYA DAISUKE·Filed 2012·Granted Sep 26, 2017·1 cites·9 claims
- 1164US10707189B2Light-emitting deviceCITIZEN ELECTRONICS·Filed 2016·Granted Jul 7, 2020·1 cites·8 claims
- 1264US9579870B2Welded joint of duplex stainless steelNAGAYAMA HIROYUKI·Filed 2012·Granted Feb 28, 2017·2 cites·32 claims
- 1364US9555496B2Process for producing welded joint using GMA welding and CO2 as a shielding gasNIPPON STEEL & SUMITOMO METAL CORP·Filed 2013·Granted Jan 31, 2017·1 cites·10 claims
- 1463US6059175AMethod for joining metallic materials by diffusion bonding and joined structure therebySUMITOMO METAL IND·Filed 1997·Granted May 9, 2000·24 cites·12 claims
- 1560US2012216904A1High-strength uoe steel pipe excellent in deformability and low-temperature toughness of heat affected zoneTAKAHASHI NOBUAKI·Filed 2012·Application pending·0 cites
- 1659US6045630AHigh-toughness, high-tensile-strength steel and method of manufacturing the sameSUMITOMO METAL IND·Filed 1998·Granted Apr 4, 2000·10 cites·13 claims
- 1758US2010226813A1High tensile strength steel and marine structure having excellent weld toughnessKAMO TAKAHIRO·Filed 2009·Application pending·0 cites
- 1855US2011070457A1High-Strength UOE Steel Pipe Excellent in Deformability and Low-Temperature Toughness of Heat Affected ZoneSUMITOMO METAL IND·Filed 2010·Application pending·0 cites
- 1953US11639735B2FastenerAOYAMA SEISAKUSHO·Filed 2020·Granted May 2, 2023·0 cites·4 claims
- 2051US6881133B2Method of grinding for a vertical type of double disc surface grinding machine for a brake discDAISHO SEIKI CORP·Filed 2003·Granted Apr 19, 2005·5 cites·5 claims
- 2150US2007051433A1High tensile strength steel and marine structure having excellent weld toughnessKAMO TAKAHIRO·Filed 2006·Application pending·0 cites
- 2249US2009022619A1Steel plate for submerged arc weldingHAMADA MASAHIKO·Filed 2008·Application pending·0 cites
- 2348US2007289655A1High-strength welded steel pipeHAMADA MASAHIKO·Filed 2007·Application pending·0 cites
- 2445US9518597B2Self-tapping screw for soft metalsAOYAMA SEISAKUSHO·Filed 2015·Granted Dec 13, 2016·0 cites·4 claims
- 2544US2013315776A1Duplex stainless steelYAMADA KENTA·Filed 2012·Application pending·0 cites
- 2643US2002182030A1Threaded fastener and method of clamping using the sameAOYAMA SEISAKUSHO·Filed 2002·Application pending·0 cites
- 2742US7780800B2Method of manufacturing a bent pipeSUMITOMO METAL IND·Filed 2007·Granted Aug 24, 2010·1 cites·8 claims
- 2841US2006039775A1Tapping screwMIZUNO HIROMICHI·Filed 2003·Application pending·0 cites
- 2929USD687609SCleaning device for optical transceiverHASHIMOTO NOBUHIRO·Filed 2010·Granted Aug 6, 2013·1 cites·1 claims
- 3023US5946786AJoining jig and joining member coupling method using the joining jigTOYOTA MOTOR CO LTD·Filed 1997·Granted Sep 7, 1999·2 cites·9 claims
Join the waitlist — get patent alerts
Get an alert when Masahiko Hamada files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →