Inventor · disambiguated record
Tohru Arai
Also filed as: ARAI TOHRU · FUJITA HINONORI
30 granted patents·2 pending applications·437 citations·filing 1973–2006
97Inventor score
Top patents by PatentIndex Score
32 records- 0187US5198285AHard and lubricant thin film of iron base metallic material coated with amorphous carbon-hydrogen-siliconTOYODA CHUO KENKYUSHO KK·Filed 1990·Granted Mar 30, 1993·53 cites·4 claims
- 0280US6518423B1Benzopiperidine derivativesEISAI CO LTD·Filed 1997·Granted Feb 11, 2003·27 cites·6 claims
- 0379US7056696B1Expression vector containing a drug-resistance gene having a destabilizing sequence as selection markerEISAI CO LTD·Filed 2001·Granted Jun 6, 2006·6 cites·18 claims
- 0479US4844949AMethod of surface treatment and apparatus used thereforTOYODA CHUO KENKYUSHO KK·Filed 1988·Granted Jul 4, 1989·39 cites·15 claims
- 0574US4597808AProcess for ion nitriding aluminum or aluminum alloysTOYODA CHUO KENKYUSHO KK·Filed 1985·Granted Jul 1, 1986·32 cites·18 claims
- 0672US4436560AProcess for manufacturing boride dispersion copper alloysTOYODA CHUO KENKYUSHO KK·Filed 1982·Granted Mar 13, 1984·24 cites·15 claims
- 0771US5443662AMethod of forming a nitride or carbonitride layerTOYODA CHUO KENKYUSHO KK·Filed 1993·Granted Aug 22, 1995·31 cites·8 claims
- 0865US4765847AMethod of treating the surface of iron alloy materialsTOYODA CHUO KENKYUSHO KK·Filed 1986·Granted Aug 23, 1988·23 cites·20 claims
- 0964US4686117AMethod of forming a carbide layerTOYODA CHUO KENKYUSHO KK·Filed 1986·Granted Aug 11, 1987·22 cites·26 claims
- 1064US4453987AMethod for producing edged toolsTOYODA CHUO KENKYUSHO KK·Filed 1982·Granted Jun 12, 1984·17 cites·13 claims
- 1159US6743620B1Method for preparing retrovirus vector for gene therapyEISAI CO LTD·Filed 1997·Granted Jun 1, 2004·11 cites·24 claims
- 1256US4786526ASurface treating method and apparatusTOYODA CHUO KENKYUSHO KK·Filed 1986·Granted Nov 22, 1988·17 cites·10 claims
- 1356US2006153810A1Process for preparing retrovirus vector for gene therapyEISAI CO LTD·Filed 2006·Application pending·0 cites
- 1453US4909862AProcess for ion nitriding aluminum materialTOYODA CHUO KENKYUSHO KK·Filed 1989·Granted Mar 20, 1990·14 cites·10 claims
- 1553US4514275AApparatus for physical vapor depositionTOYODA CHUO KENKYUSHO KK·Filed 1984·Granted Apr 30, 1985·14 cites·13 claims
- 1652US4569862AMethod of forming a nitride layerTOYODA CHUO KENKYUSHO KK·Filed 1985·Granted Feb 11, 1986·14 cites·22 claims
- 1752US4202705ATreating bath, forming a mixed carbide layer of Va-Group elements on a ferrous alloy surface and resulting productTOYODA CHUO KENKYUSHO KK·Filed 1978·Granted May 13, 1980·11 cites·14 claims
- 1852US3959092AMethod for a surface treatment of cemented carbide articleTOYODA CHUO KENKYUSHO KK·Filed 1973·Granted May 25, 1976·6 cites·17 claims
- 1949US4794044AMethod for surface treatmentTOYODA CHUO KENKYUSHO KK·Filed 1987·Granted Dec 27, 1988·10 cites·21 claims
- 2049US4158578AMethod for forming a carbide layer of a Va-Group element of the periodic table or chromium on the surface of a ferrous alloy articleTOYODA CHUO KENKYUSHO KK·Filed 1978·Granted Jun 19, 1979·10 cites·41 claims
- 2147US4230751ATreating composition, forming a mixed-carbide layer of Va-Group elements and of chromium on a ferrous-alloy surface and resulting productTOYOTA KK·Filed 1978·Granted Oct 28, 1980·9 cites·38 claims
- 2245US2004092737A1Benzopiperidine derivativesEISAI CO LTD·Filed 2002·Application pending·0 cites
- 2344US4400224AMethod for forming a carbide layer on the surface of a ferrous alloy article or a cemented carbide articleTOYODA CHUO KENKYUSHO KK·Filed 1982·Granted Aug 23, 1983·8 cites·20 claims
- 2443US4871401AFluidized bed method of forming a nitride or carbonitride layerTOYODA CHUO KENKYUSHO KK·Filed 1987·Granted Oct 3, 1989·9 cites·19 claims
- 2539US4818351AMethod for the surface treatment of an iron or iron alloy articleTOYODA CHUO KENKYUSHO KK·Filed 1987·Granted Apr 4, 1989·7 cites·20 claims
- 2639US4250208AMethod for forming a two-layered carbide surface on a ferrous-alloy article and resulting productTOYODA CHUO KENKYUSHO KK·Filed 1979·Granted Feb 10, 1981·5 cites·10 claims
- 2737US3930575AMethod for a surface treatment of an iron, ferrous alloy or cemented carbide articleTOYODA CHUO KENKYUSHO KK·Filed 1973·Granted Jan 6, 1976·2 cites·9 claims
- 2834US4009086AMethod for a surface treatment of an iron, ferrous alloy or cemented carbide articleTOYODA CHUO KENKYUSHO KK·Filed 1975·Granted Feb 22, 1977·3 cites·12 claims
- 2933US4804445AMethod for the surface treatment of an iron or iron alloy articleTOYODA CHUO KENKYUSHO KK·Filed 1987·Granted Feb 14, 1989·3 cites·14 claims
- 3033US4436559AProcess for manufacturing boride dispersion copper alloysTOYODA CHUO KENKYUSHO KK·Filed 1982·Granted Mar 13, 1984·3 cites·16 claims
- 3130US4892759AMethod for surface treatmentARAI TOHRU·Filed 1988·Granted Jan 9, 1990·6 cites·18 claims
- 3229US4778540AMethod for surface treatment and treating material thereforTOYODA CHUO KENKYUSHO KK·Filed 1987·Granted Oct 18, 1988·1 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →