Patent Issued for Dose detection with piezoelectric sensing for a medication delivery device (USPTO 11612698).

Accordingly, there is a need for a device that is operable to automatically detect the dose delivered by measuring mechanical parts which directly correspond to the dose displayed in the dose window to the user of the medication delivery device during an injection event. "The dose detection systems described herein have the advantage that they are measuring mechanical parts which directly correspond to the dose displayed in the dose window to the user of the medication delivery device.". [Extracted from the article]