ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,515, issued on April 21, was assigned to Trudell Medical International Inc. (London, Canada).

"Aerosol delivery device with completed dosage indicator" was invented by Matthew Gravett (London, Canada), Daniela Manotas (London, Canada), Hannah Hammond (Hamilton, Canada) and Robert Frank Costa (London, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A medication delivery system includes a chamber housing defining an interior volume. The chamber housing has an inlet adapted to receive a dosage of medicament and an outlet spaced apart from the inlet. The inlet and outlet are in fluid communication with the interior volume. A flow channel is in fl...