A powder inhalation device comprising a housing containing a pharmacologically active compound, a conduit (8) with an outlet extending into the housing through which a user can inhale to create an airflow through the conduit, a dosing unit (6,7) for delivering a dose of the compound to the conduit and...http://www.google.ca/patents/US6065472?utm_source=gb-gplus-sharePatent US6065472 - Multidose powder inhalation device
