Inventor · disambiguated record
Tomofumi Kawamura
Also filed as: KAWAMURA TOMOFUMI
23 granted patents·4 pending applications·56 citations·filing 2014–2025
92Inventor score
Technology areasG03G
Files withCANON KK27
Top patents by PatentIndex Score
27 records- 0198US9164424B2Cartridge with flexible developer bag and elastic member for acting on the developer bagCANON KK·Filed 2014·Granted Oct 20, 2015·38 cites·18 claims
- 0295US11016440B2Cartridge reproduction method and cartridgeCANON KK·Filed 2020·Granted May 25, 2021·4 cites·20 claims
- 0393US11442379B2Toner cartridge for an image forming apparatus including a pump to discharge toner by putting air into the toner discharge chamberCANON KK·Filed 2021·Granted Sep 13, 2022·2 cites·18 claims
- 0492US10732545B2Cartridge remanufacturing method and cartridgeCANON KK·Filed 2019·Granted Aug 4, 2020·7 cites·25 claims
- 0586US10459396B2Image forming apparatusCANON KK·Filed 2017·Granted Oct 29, 2019·2 cites·17 claims
- 0679US10955794B2Cartridge and remanufacturing method of cartridgeCANON KK·Filed 2020·Granted Mar 23, 2021·1 cites·11 claims
- 0776US2025306528A1Developing apparatus and cartridgeCANON KK·Filed 2025·Application pending·0 cites
- 0875US10571858B2Image forming apparatus and configuration of cartridge unitCANON KK·Filed 2018·Granted Feb 25, 2020·1 cites·7 claims
- 0975US10496034B2Image forming apparatusCANON KK·Filed 2017·Granted Dec 3, 2019·1 cites·11 claims
- 1075US2025306504A1Developing apparatusCANON KK·Filed 2025·Application pending·0 cites
- 1175US2025306500A1Developing deviceCANON KK·Filed 2025·Application pending·0 cites
- 1274US12461468B2Toner cartridge having feeding member and pump for discharging tonerCANON KK·Filed 2023·Granted Nov 4, 2025·0 cites·20 claims
- 1373US11841644B2Toner cartridge and image forming apparatus including a screw to convey toner in the cartridge, an elastic member to loosen the toner, and a means to discharge toner together with air to the outside of the cartridgeCANON KK·Filed 2022·Granted Dec 12, 2023·0 cites·19 claims
- 1472US11971682B2Cartridge and image forming apparatusCANON KK·Filed 2023·Granted Apr 30, 2024·0 cites·17 claims
- 1571US2025306503A1Cartridge and developing deviceCANON KK·Filed 2025·Application pending·0 cites
- 1669US10852687B2Image forming apparatusCANON KK·Filed 2019·Granted Dec 1, 2020·0 cites·8 claims
- 1767US11982952B2Toner cartridge having feeding member and pump for discharging pumpCANON KK·Filed 2021·Granted May 14, 2024·0 cites·51 claims
- 1867US11650538B2Cartridge and image forming apparatusCANON KK·Filed 2022·Granted May 16, 2023·0 cites·51 claims
- 1966US11360427B2Cartridge and remanufacturing method of cartridgeCANON KK·Filed 2021·Granted Jun 14, 2022·0 cites·9 claims
- 2066US10261463B2Image forming apparatusCANON KK·Filed 2018·Granted Apr 16, 2019·0 cites·23 claims
- 2165US10423119B2Image forming apparatus including a pressing member configured to press a development unitCANON KK·Filed 2018·Granted Sep 24, 2019·0 cites·10 claims
- 2263US10191445B2Image forming apparatusCANON KK·Filed 2018·Granted Jan 29, 2019·0 cites·11 claims
- 2362US10018959B2Image forming apparatusCANON KK·Filed 2017·Granted Jul 10, 2018·0 cites·19 claims
- 2461US10073408B2Image forming apparatus including a pressing member configured to press a development unitCANON KK·Filed 2017·Granted Sep 11, 2018·0 cites·12 claims
- 2560US9927764B2Image forming apparatusCANON KK·Filed 2017·Granted Mar 27, 2018·0 cites·5 claims
- 2657US10816930B2Image forming apparatusCANON KK·Filed 2018·Granted Oct 27, 2020·0 cites·11 claims
- 2751US11287763B2Toner transport apparatusCANON KK·Filed 2020·Granted Mar 29, 2022·0 cites·13 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →