Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Image forming apparatus measuring developer amount in developing device on the basis of duty ratio of magnetic permeability of developer in developing device

Image forming apparatus measuring developer amount in developing device on the basis of duty ratio of magnetic permeability of developer in developing device

US Patent 9201339 · Granted Dec 1, 2015

Estimated economic value: $26,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Inkjet recording apparatus2024
Image forming apparatus2017
Image forming apparatus and toner state determination method thereof2016
Image-forming apparatus and method for controlling image-forming apparatus2014
Image forming apparatus and method for detecting the fullness of waste-toner con2012