Assignee
TOKYO GAS CO LTD
JP·176 granted patents·5 pending applications·3,657 citations·filing 1975–2020
Top patents by PatentIndex Score
181 records- 0197US5736821AIntrapipe work robot apparatus and method of measuring position of intrapipe work robotTOKYO GAS CO LTD·Filed 1995·Granted Apr 7, 1998·161 cites·5 claims
- 0295US6505866B1Pipe jointTOKYO GAS CO LTD·Filed 2000·Granted Jan 14, 2003·101 cites·14 claims
- 0395US4350548AMethod and apparatus for providing the inner surface of a pipe line with a liningTOKYO GAS CO LTD·Filed 1981·Granted Sep 21, 1982·94 cites·14 claims
- 0493US5639431AHydrogen producing apparatusTOKYO GAS CO LTD·Filed 1994·Granted Jun 17, 1997·167 cites·30 claims
- 0593US4368091AMethod for providing the inner surface of a pipe with a flexible tubular lining material through a liquid resin under pressureTOKYO GAS CO LTD·Filed 1979·Granted Jan 11, 1983·109 cites·13 claims
- 0692US7569208B2Diagnostic agents for pancreatic exocrine functionTOKYO GAS CO LTD·Filed 2006·Granted Aug 4, 2009·10 cites·18 claims
- 0792US5333501AAbnormality monitoring apparatus for a pipelineTOKYO GAS CO LTD·Filed 1990·Granted Aug 2, 1994·100 cites·1 claims
- 0891US4576205ATubular lining material for pipe lines having bendsTOKYO GAS CO LTD·Filed 1984·Granted Mar 18, 1986·76 cites·14 claims
- 0991US4021188ABurner configurations for staged combustionTOKYO GAS CO LTD·Filed 1975·Granted May 3, 1977·120 cites·35 claims
- 1089US6433474B1Current injection-type diamond ultraviolet light-emitting deviceTOKYO GAS CO LTD·Filed 2000·Granted Aug 13, 2002·38 cites·65 claims
- 1189US5077107ALining material for pipelinesTOKYO GAS CO LTD·Filed 1988·Granted Dec 31, 1991·101 cites·11 claims
- 1288US4877665ALining material for pipe linesTOKYO GAS CO LTD·Filed 1987·Granted Oct 31, 1989·30 cites·12 claims
- 1386US5980716AWater treatment apparatus for a fuel cell systemTOKYO GAS CO LTD·Filed 1996·Granted Nov 9, 1999·96 cites·2 claims
- 1486US5623203ARemote field flaw sensor including an energizing coil, first and second receiving coil groups oriented perpendicular and a third receiving coil oriented parallel to pipeTOKYO GAS CO LTD·Filed 1995·Granted Apr 22, 1997·91 cites·4 claims
- 1586US4427480AMethod and apparatus for providing the inner surface of a pipe line with a tubular lining materialTOKYO GAS CO LTD·Filed 1983·Granted Jan 24, 1984·61 cites·17 claims
- 1685US4334943AMethod for smoothly evaginating a tubular material under pressureTOKYO GAS CO LTD·Filed 1980·Granted Jun 15, 1982·55 cites·15 claims
- 1784US7989113B2Solid-oxide shaped fuel cell moduleTOKYO GAS CO LTD·Filed 2004·Granted Aug 2, 2011·32 cites·15 claims
- 1884US5861556AFlowmeterTOKYO GAS CO LTD·Filed 1996·Granted Jan 19, 1999·63 cites·15 claims
- 1984US4945841AApparatus or method for carrying out combustion in a furnaceTOKYO GAS CO LTD·Filed 1989·Granted Aug 7, 1990·55 cites·17 claims
- 2083US6071245ADiagnostic agent for liver functionTOKYO GAS CO LTD·Filed 1998·Granted Jun 6, 2000·72 cites·12 claims
- 2182US5963042AMethod for inspecting the elements of piping systems by electromagnetic wavesTOKYO GAS CO LTD·Filed 1998·Granted Oct 5, 1999·44 cites·20 claims
- 2282US5368476ALow-NOx gas burnerTOKYO GAS CO LTD·Filed 1992·Granted Nov 29, 1994·50 cites·14 claims
- 2382US4704897ALocating method of and the locating unit for leaks on pipingTOKYO GAS CO LTD·Filed 1986·Granted Nov 10, 1987·38 cites·8 claims
- 2481US7182921B2Cylindrical steam reforming unitTOKYO GAS CO LTD·Filed 2002·Granted Feb 27, 2007·36 cites·10 claims
- 2581US6481207B2Single-pipe cylinder type reformer and method of operating the sameTOKYO GAS CO LTD·Filed 2000·Granted Nov 19, 2002·29 cites·25 claims
- 2680US6905668B1Diagnostic agents for pancreatic exocrine functionTOKYO GAS CO LTD·Filed 2000·Granted Jun 14, 2005·8 cites·7 claims
- 2780US6123027ASelf-propelled vehicle within pipeTOKYO GAS CO LTD·Filed 1998·Granted Sep 26, 2000·59 cites·7 claims
- 2879US5318438ABurner low in the generation of nitrogen oxides and a small combustion apparatusTOKYO GAS CO LTD·Filed 1992·Granted Jun 7, 1994·41 cites·19 claims
- 2977US5802911ASemiconductor layer pressure switchTOKYO GAS CO LTD·Filed 1994·Granted Sep 8, 1998·30 cites·5 claims
- 3077US5164237ALining material for pipelinesTOKYO GAS CO LTD·Filed 1991·Granted Nov 17, 1992·38 cites·11 claims
- 3175US7736774B2Solid oxide fuel cell systemTOKYO GAS CO LTD·Filed 2003·Granted Jun 15, 2010·16 cites·25 claims
- 3274US6875410B2Adsorbent for removing sulfur compounds from fuel gases and removal methodTOKYO GAS CO LTD·Filed 2003·Granted Apr 5, 2005·23 cites·6 claims
- 3374US5474800AMethod for preparing anode for solid oxide fuel cellsTOKYO GAS CO LTD·Filed 1993·Granted Dec 12, 1995·33 cites·3 claims
- 3474US5423578ACoupling for corrugated pipeTOKYO GAS CO LTD·Filed 1993·Granted Jun 13, 1995·48 cites·20 claims
- 3574US4684556ATubular lining material for pipe lineTOKYO GAS CO LTD·Filed 1985·Granted Aug 4, 1987·41 cites·12 claims
- 3674US4585161AAir fuel ratio control system for furnaceTOKYO GAS CO LTD·Filed 1985·Granted Apr 29, 1986·36 cites·8 claims
- 3773US7404945B2Method of evaluating pharmacological effects of medicineTOKYO GAS CO LTD·Filed 2003·Granted Jul 29, 2008·4 cites·26 claims
- 3873US5202570AGas detection deviceTOKYO GAS CO LTD·Filed 1991·Granted Apr 13, 1993·43 cites·1 claims
- 3970US7037472B2Single-pipe cylinder-type reformerTOKYO GAS CO LTD·Filed 2001·Granted May 2, 2006·18 cites·20 claims
- 4070US5352590AProcess for the preparation of 13 C-labelled compoundsTOKYO GAS CO LTD·Filed 1992·Granted Oct 4, 1994·11 cites·14 claims
- 4169US5049066ABurner for reducing NOx emissionsTOKYO GAS CO LTD·Filed 1990·Granted Sep 17, 1991·38 cites·9 claims
- 4268US7572598B2Preparation comprising albumin esterified with a labeled substance for diagnosis of pancreatic exocrine functionTOKYO GAS CO LTD·Filed 2006·Granted Aug 11, 2009·0 cites·2 claims
- 4368US7125683B2Preparations for diagnosis extrapancreatic secretory functionTOKYO GAS CO LTD·Filed 2001·Granted Oct 24, 2006·2 cites·13 claims
- 4468US6823859B2Flat heating surface type gas stoveTOKYO GAS CO LTD·Filed 2003·Granted Nov 30, 2004·10 cites·2 claims
- 4568USRE38575EDiagnostic method for diabetes using C-13 labeled pyruvic acidTOKYO GAS CO LTD·Filed 2002·Granted Aug 31, 2004·1 cites·2 claims
- 4668US6008657AMethod for inspecting the elements of piping systems by electromagnetic wavesTOKYO GAS CO LTD·Filed 1995·Granted Dec 28, 1999·23 cites·13 claims
- 4768US5821402AThin film deposition method and gas sensor made by the methodTOKYO GAS CO LTD·Filed 1997·Granted Oct 13, 1998·36 cites·10 claims
- 4867US7550272B2Method for diagnosis of pancreatic exocrine functionTOKYO GAS CO LTD·Filed 2006·Granted Jun 23, 2009·0 cites·6 claims
- 4967US6872981B1Diamond ultraviolet luminescent elementTOKYO GAS CO LTD·Filed 2000·Granted Mar 29, 2005·18 cites·17 claims
- 5067US5501548AMethod for controlling the direction of a shield tunneling machine and an apparatus thereforTOKYO GAS CO LTD·Filed 1994·Granted Mar 26, 1996·38 cites·2 claims
Showing the top 50 of 181 patent records by PatentIndex Score.
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