highly doubt it. Based on both descriptions, the only commonality is the fact that it is medically based. Apart from that, they sound like two completely different utilities.
The walmart patent is based around and requires a dedicated and probably propitiatory wearable device that can be scanned by first responders in the event that the patient is unconscious.
And although I really haven't done any extensive searching, so I'm not going on anything more than recollection of what I have read in company releases; DRWN's patent seems to revolve more around medical records getting transfered between medical facilities and billing activities.
jmo
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