US Patent 7747345 Automatic drug dispenser and drug feeder

An automatic drug dispenser includes: a drug cassette which ejectably accommodates drugs; a base unit which detachably supports the drug cassette and drives a motor to eject drugs; a drug feeder storage which is designed to store a large number of base units; a reading device which is provided in each of the base units and reads identification information assigned to the drug cassette; and a checking means which compares a result of reading with pre-stored check data, wherein a microprocessor is mounted in each of the base units, and the checking means, the check data and history information related to the cassette are built in each microprocessor in a distributed manner.