Inventor · disambiguated record
Shigeki Yokoyama
Also filed as: YOKOYAMA SHIGEKI
51 granted patents·1 pending application·1,321 citations·filing 1979–2019
99Inventor score
Files withFUJI PHOTO FILM CO LTD31NIPPON OIL CO LTD10JUJO PAPER CO LTD3NIPPON PETROCHEMICALS CO LTD3YOKOYAMA SHIGEKI2
Top patents by PatentIndex Score
52 records- 0197US6338808B1Liquid crystal composition comprising liquid crystal molecules and alignment promoterFUJI PHOTO FILM CO LTD·Filed 2000·Granted Jan 15, 2002·118 cites·14 claims
- 0295US6380996B1Optical compensatory sheet and liquid crystal displayFUJI PHOTO FILM CO LTD·Filed 2000·Granted Apr 30, 2002·91 cites·14 claims
- 0393US5578373ASplit polyethylene stretched material and process for producing the sameNIPPON OIL CO LTD·Filed 1994·Granted Nov 26, 1996·125 cites·14 claims
- 0492US4510233AAntistatic agent containing silver halide photographic light-sensitive materialsFUJI PHOTO FILM CO LTD·Filed 1983·Granted Apr 9, 1985·31 cites·13 claims
- 0591US5647988AMethod of back-washing submerged-type ceramic membrane separation apparatusKUBOTA KK·Filed 1994·Granted Jul 15, 1997·183 cites·7 claims
- 0690US5106555AProcess for the continuous production of high-strength and high-modulus polyethylene materialNIPPON OIL CO LTD·Filed 1990·Granted Apr 21, 1992·78 cites·22 claims
- 0790US4891306APhotographic light-sensitive silver halide material containing an antistatic block copolymerFUJI PHOTO FILM CO LTD·Filed 1988·Granted Jan 2, 1990·24 cites·14 claims
- 0888US5183729AMethod for forming color imageFUJI PHOTO FILM CO LTD·Filed 1991·Granted Feb 2, 1993·16 cites·21 claims
- 0985US5106558AMethod for continuous preparation of polyethylene material having high strength and high modulus of elasticityNIPPON OIL CO LTD·Filed 1990·Granted Apr 21, 1992·56 cites·24 claims
- 1084US4388402APhotographic light-sensitive materialFUJI PHOTO FILM CO LTD·Filed 1981·Granted Jun 14, 1983·21 cites·19 claims
- 1183US4879076AProcess for the production of polyethylene materialsNIPPON OIL CO LTD·Filed 1987·Granted Nov 7, 1989·39 cites·10 claims
- 1283US4677050ASilver halide photographic element containing crosslinked copolymersFUJI PHOTO FILM CO LTD·Filed 1986·Granted Jun 30, 1987·17 cites·16 claims
- 1380US6245398B1Optically anisotropic sheet containing discotic liquid crystal molecules twisted with optically active triphenylene compoundFUJI PHOTO FILM CO LTD·Filed 2000·Granted Jun 12, 2001·23 cites·14 claims
- 1480US4597818AMethod for producing laminated sheets or filmsNIPPON PETROCHEMICALS CO LTD·Filed 1985·Granted Jul 1, 1986·69 cites·6 claims
- 1579US4649102ASilver halide photographic light-sensitive materialFUJI PHOTO FILM CO LTD·Filed 1986·Granted Mar 10, 1987·15 cites·12 claims
- 1678US6485798B1Optical compensatory sheet comprising substrate and optically anisotropic layerFUJI PHOTO FILM CO LTD·Filed 2000·Granted Nov 26, 2002·20 cites·16 claims
- 1778US5747121AOptical compensatory sheetFUJI PHOTO FILM CO LTD·Filed 1996·Granted May 5, 1998·42 cites·10 claims
- 1878US4722885APhotographic light-sensitive material containing a specified graft polymer or copolymerFUJI PHOTO FILM CO LTD·Filed 1985·Granted Feb 2, 1988·13 cites·20 claims
- 1978US4495275ASilver halide photographic materialsFUJI PHOTO FILM CO LTD·Filed 1981·Granted Jan 22, 1985·17 cites·5 claims
- 2073US4374924AAntistatic silver halide photographic light-sensitive materialFUJI PHOTO FILM CO LTD·Filed 1982·Granted Feb 22, 1983·14 cites·21 claims
- 2173US4362812APhotographic materialsFUJI PHOTO FILM CO LTD·Filed 1981·Granted Dec 7, 1982·14 cites·15 claims
- 2272US5002714AProcess for producing highly oriented polyethylene materialNIPPON OIL CO LTD·Filed 1989·Granted Mar 26, 1991·30 cites·12 claims
- 2372US4923935AProcess for producing polyethylene of ultrahigh molecular weightNIPPON OIL CO LTD·Filed 1989·Granted May 8, 1990·22 cites·5 claims
- 2467US5445883ALaminateNIPPON OIL CO LTD·Filed 1994·Granted Aug 29, 1995·36 cites·36 claims
- 2567US4921968APyrazoloazoleazomethine dyesFUJI PHOTO FILM CO LTD·Filed 1987·Granted May 1, 1990·6 cites·12 claims
- 2666US5118812APyrazoloazole series couplersFUJI PHOTO FILM CO LTD·Filed 1990·Granted Jun 2, 1992·6 cites·8 claims
- 2766US4624913ASilver halide photographic light-sensitive materialsFUJI PHOTO FILM CO LTD·Filed 1985·Granted Nov 25, 1986·9 cites·30 claims
- 2864US8712002B2Nuclear reactor building and construction method thereofYOKOYAMA SHIGEKI·Filed 2010·Granted Apr 29, 2014·1 cites·3 claims
- 2963US4366238ASilver halide photographic materialsFUJI PHOTO FILM CO LTD·Filed 1981·Granted Dec 28, 1982·21 cites·8 claims
- 3061US6606140B1Optical compensatory sheet comprising substrate, orientation layer and optically anisotropic layerFUJI PHOTO FILM CO LTD·Filed 1999·Granted Aug 12, 2003·14 cites·10 claims
- 3160US6726965B2Optical compensatory sheet comprising substrate, orientation layer and optically anisotropic layerFUJI PHOTO FILM CO LTD·Filed 2002·Granted Apr 27, 2004·5 cites·9 claims
- 3259US11251434B2Organic expander for lead storage batteryJUJO PAPER CO LTD·Filed 2019·Granted Feb 15, 2022·0 cites·3 claims
- 3359US5189280AGlow plug for diesel enginesHITACHI METALS LTD·Filed 1991·Granted Feb 23, 1993·22 cites·18 claims
- 3458US4812355AFinish laminates for high frequency circuitsNIPPON PETROCHEMICALS CO LTD·Filed 1988·Granted Mar 14, 1989·20 cites·18 claims
- 3557US4622288APhotographic light-sensitive material having improved antistaticityFUJI PHOTO FILM CO LTD·Filed 1985·Granted Nov 11, 1986·11 cites·12 claims
- 3651US5026867APyrazoloazoleazomethine dyesYOKOYAMA SHIGEKI·Filed 1990·Granted Jun 25, 1991·3 cites·9 claims
- 3751US4304847AColor image forming dye bleach processFUJI PHOTO FILM CO LTD·Filed 1979·Granted Dec 8, 1981·2 cites·39 claims
- 3850US4704439AChlorinated linear ultra low density polyethyleneNIPPON OIL CO LTD·Filed 1986·Granted Nov 3, 1987·8 cites·4 claims
- 3949US4760120AEasily soluble polyethylene powder for the preparation of fibers or films having high strength and high elastic modulusNIPPON OIL CO LTD·Filed 1986·Granted Jul 26, 1988·8 cites·4 claims
- 4048US4859576ASilver halide photographic material comprising a protective layer containing a polyoxyethylene surface active agentFUJI PHOTO FILM CO LTD·Filed 1988·Granted Aug 22, 1989·5 cites·24 claims
- 4147US10155209B2DispersantJUJO PAPER CO LTD·Filed 2014·Granted Dec 18, 2018·0 cites·13 claims
- 4247US4623615ASilver halide photographic light-sensitive materialsFUJI PHOTO FILM CO LTD·Filed 1984·Granted Nov 18, 1986·5 cites·13 claims
- 4347US4623614ASilver halide photographic light-sensitive materialsFUJI PHOTO FILM CO LTD·Filed 1985·Granted Nov 18, 1986·11 cites·6 claims
- 4446US6569502B1Optical compensatory sheet comprising substrate, orientation layer and optically anisotropic layerFUJI PHOTO FILM CO LTD·Filed 1999·Granted May 27, 2003·13 cites·23 claims
- 4546US5026511AProcess for the production of polyethylene materialsNIPPON OIL CO LTD·Filed 1990·Granted Jun 25, 1991·9 cites·8 claims
- 4646US2019210921A1Additive for cement composition and cement compositionJUJO PAPER CO LTD·Filed 2017·Application pending·0 cites
- 4745US5182339APyrazoloazoleazomethine dyesFUJI PHOTO FILM CO LTD·Filed 1990·Granted Jan 26, 1993·2 cites·12 claims
- 4844US4767819AUltra-high-molecular-weight polyethylene solutionNIPPON PETROCHEMICALS CO LTD·Filed 1987·Granted Aug 30, 1988·5 cites·4 claims
- 4938US4518354ASilver halide photographic light-sensitive materials with antistatic layer containing nonionic surface active agentFUJI PHOTO FILM CO LTD·Filed 1983·Granted May 21, 1985·5 cites·8 claims
- 5037US4558001ASilver halide photographic light-sensitive materials containing nonionic surface active antistatic agentFUJI PHOTO FILM CO LTD·Filed 1984·Granted Dec 10, 1985·3 cites·10 claims
Showing the top 50 of 52 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Shigeki Yokoyama 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 →