Inventor · disambiguated record
Toyokazu Okada
Also filed as: OKADA TOYOKAZU
11 granted patents·357 citations·filing 1985–2005
92Inventor score
Files withSUMITOMO CHEMICAL CO11
Top patents by PatentIndex Score
11 records- 0193US4859039ALight-polarizing filmSUMITOMO CHEMICAL CO·Filed 1985·Granted Aug 22, 1989·91 cites·7 claims
- 0282US5061042APhase retarder and liquid crystal display using the sameSUMITOMO CHEMICAL CO·Filed 1991·Granted Oct 29, 1991·70 cites·15 claims
- 0378US5310509ADye-containing light-polarizing filmSUMITOMO CHEMICAL CO·Filed 1992·Granted May 10, 1994·18 cites·26 claims
- 0477US4802745ALight-polarizing filmsSUMITOMO CHEMICAL CO·Filed 1987·Granted Feb 7, 1989·28 cites·10 claims
- 0574US5244713AOptical filmSUMITOMO CHEMICAL CO·Filed 1992·Granted Sep 14, 1993·34 cites·26 claims
- 0673US4953952AColor liquid crystal displaying panelsSUMITOMO CHEMICAL CO·Filed 1988·Granted Sep 4, 1990·35 cites·6 claims
- 0772US4803014ALight-polarizing filmSUMITOMO CHEMICAL CO·Filed 1986·Granted Feb 7, 1989·23 cites·11 claims
- 0868US5285303APhase retarder and process for producing the sameSUMITOMO CHEMICAL CO·Filed 1991·Granted Feb 8, 1994·28 cites·3 claims
- 0958US5082601ALight-polarizing filmsSUMITOMO CHEMICAL CO·Filed 1990·Granted Jan 21, 1992·16 cites·6 claims
- 1058US4895677ALight-polarizing filmSUMITOMO CHEMICAL CO·Filed 1988·Granted Jan 23, 1990·14 cites·1 claims
- 1138US7586680B2Projection screen having a plural number of light control layersSUMITOMO CHEMICAL CO·Filed 2005·Granted Sep 8, 2009·0 cites·7 claims
Join the waitlist — get patent alerts
Get an alert when Toyokazu Okada 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 →