A toner having high mechanical strength and being capable of exhibiting a sufficient fixing property in a wide temperature range is provided. Further, a fixing device and an image forming apparatus in which such a toner can be suitably used are provided. The toner contains polyester-based resin as a...http://www.google.es/patents/US7189485?utm_source=gb-gplus-sharePatente US7189485 - Toner
