Signals may be generated in a drug delivering apparatus through which a person inhales to generate a inhaled airstream to signal to the person to cease inhalation after a pre-set period of time has elapsed from detection of the commencement breathing by that person. The pre-set period of time for subsequent...http://www.google.fr/patents/US7748382?utm_source=gb-gplus-shareBrevet US7748382 - Inhalation method and apparatus
