An odor generation alarm and a method for informing an unusual situation having a high attention attracting effect and a high degree of safety are provided. An odor generation alarm includes an odorant receptacle, a drive section, a detector and a circuit section which is a controller. The odorant receptacle...http://www.google.com/patents/US20100308995?utm_source=gb-gplus-sharePatent US20100308995 - ODOR GENERATION ALARM AND METHOD FOR INFORMING UNUSUAL SITUATION
