04971221 is referenced by 78 patents and cites 32 patents.

A device for monitoring the dispensing of drugs to a patient is disclosed. This device includes a detector which determines the actual physical delivery of the drug dosage to the patient. This eliminates ambiguities associated with devices in the art which only monitor inferentially the dispensing of the drug dosage to the patient. The detector can include an optical sensor which notes the physical passage of the drug dosage through a dispensing port to the patient.

Title
Drug dispenser having means for detecting dispensing events
Application Number
7/275814
Publication Number
4971221
Application Date
November 23, 1988
Publication Date
November 20, 1990
Inventor
Richard G Hamilton
Fremont
CA, US
John Urquhart
Palo Alto
CA, US
Agent
Irell & Manella
Assignee
Aprex Corporation
CA, US
IPC
B65D 83/04
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