Recording-head substrate, recording head, and recording...

Recording-medium-residual-quantity detecting device,...

Reduced EMI printhead apparatus and method

Reduced size inkjet printhead heater chip having integral...

Reducing ink bleed artifacts

Reduction of artefacts in reproduced images

Reduction of color plane alignment error in a drum printer

Reduction of dependence of color appearance on light source

Refill apparatus and method

Refillable ink supply cartridge for a postcard printing...

Refilling a print cartridge reservoir

Reflective type media sensing methodology

Registration adjusting method of ink-jet printing apparatus

Registration error reduction in a tandem printer

Regulating energy based on delivered energy

Remaining battery capacity determination method and apparatus

Remaining ink detecting device and ink jet head cartridge

Remaining ink detection in an ink jet recording apparatus

Remaining ink level detection method and inkjet printing...

Remaining ink level detection method and inkjet printing...