Inventor · disambiguated record
Ryohei Tsutsumi
Also filed as: TSUTSUMI RYOHEI
4 granted patents·2 citations·filing 2021–2023
59Inventor score
Technology areasG03G
Files withCANON KK4
Top patents by PatentIndex Score
4 records- 0191US11860565B2Restricting member, developing device, process cartridge, and image forming apparatusCANON KK·Filed 2022·Granted Jan 2, 2024·2 cites·15 claims
- 0273US12455528B2Restricting member, developing device, process cartridge, and image forming apparatusCANON KK·Filed 2023·Granted Oct 28, 2025·0 cites·15 claims
- 0367US11693335B2Development cartridgeCANON KK·Filed 2022·Granted Jul 4, 2023·0 cites·8 claims
- 0462US11300900B2Development cartridgeCANON KK·Filed 2021·Granted Apr 12, 2022·0 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →