Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Drum unit having electrical contact surface positioned at outer surface of frame and image forming apparatus provided with the same

Drum unit having electrical contact surface positioned at outer surface of frame and image forming apparatus provided with the same

US Patent 12271148 · Granted Apr 8, 2025

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Developing cartridge capable of reducing size of image forming apparatus2025
Image forming apparatus and process cartridge with separatable developing roller2025
Developing cartridge2025
Developing cartridge having coupling and developing roller2025
Drum cartridge having electrical contact surface positioned at outer surface of 2025
Developing cartridge provided with cover2025
Image forming apparatus including process cartridge, and toner cartridge having 2025
Developing cartridge capable of reducing size of image forming apparatus2025
Developing cartridge having coupling and developing roller2025
Drum cartridge including electrical contact surface movable relative to drum fra2025
Developing cartridge2025
Method for removing and attaching first holder member relative to second holder 2025