Inventor
OOKUBO KENJI
JP13 patents
⚠️ This page may combine multiple inventors who share the name “OOKUBO KENJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CANON KK
12 patentsUS10545420B2Jan 28, 2020
Magnetic toner and image-forming method
CANON KK37 citations94
US9880478B2Jan 30, 2018
Method of producing toner
CANON KK53 citations93
US11249412B2Feb 15, 2022
Toner
CANON KK10 citations85
US11181845B2Nov 23, 2021
Toner
CANON KK13 citations85
US12346064B2Jul 1, 2025
Toner
CANON KK0 citations62
US11714363B2Aug 1, 2023
Toner
CANON KK1 citations62
US11274179B2Mar 15, 2022
Method for producing compound having amide bond and also having alkoxysilyl group
CANON KK0 citations62
US7651861B2Jan 26, 2010
Method of producing fluorite crystal, fluorite and optical system incorporating the same
CANON KK2 citations61
US12529973B2Jan 20, 2026
Toner
CANON KK0 citations58
US12449742B2Oct 21, 2025
Toner and method for manufacturing toner
CANON KK0 citations51
US12510839B2Dec 30, 2025
Process cartridge and process cartridge set
CANON KK0 citations50
US7035306B2Apr 25, 2006
Method of assaying fluorite sample and method of producing fluorite crystal
CANON KK0 citations50