Inventor · disambiguated record
Ryouhei Oka
Also filed as: OKA Ryouhei
2 granted patents·1 pending application·2 citations·filing 2021–2022
35Inventor score
Files withDNP FINE CHEMICALS CO LTD3
Top patents by PatentIndex Score
3 records- 0185US12104068B2Non-aqueous ink composition, inkjet recording method, and method for manufacturing printed matterDNP FINE CHEMICALS CO LTD·Filed 2021·Granted Oct 1, 2024·2 cites·15 claims
- 0267US12338356B2Nonaqueous ink composition, and recording method and recorded matter manufacturing method using sameDNP FINE CHEMICALS CO LTD·Filed 2021·Granted Jun 24, 2025·0 cites·22 claims
- 0340US2025019553A1Maintenance fluid, method for producing maintenance fluid, method for maintaining ink-jet recording device, and ink-jet recording deviceDNP FINE CHEMICALS CO LTD·Filed 2022·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Ryouhei Oka 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 →