| http://www.w3.org/ns/prov#value | - ct 30, 2001Canon Kabushiki KaishaProcess cartridge and image forming apparatus including means for detecting mounting of the process cartridge to main body of image forming apparatus, and process cartridge and developer cartridge including positioning portionUS6317572Oct 26, 1999Nov 13, 2001Canon Kabushiki KaishaElectrophotographic image forming apparatus and process cartridge detachably mountable
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