08836513 is referenced by 34 patents and cites 889 patents.

The system of the present invention includes a conductive element, an electronic component, and a partial power source in the form of dissimilar materials. Upon contact with a conducting fluid, a voltage potential is created and the power source is completed, which activates the system. The electronic component controls the conductance between the dissimilar materials to produce a unique current signature. The system can also be associated with food and communicate data about ingestion of food material to a receiver.

Title
Communication system incorporated in an ingestible product
Application Number
13/180507
Publication Number
8836513 (B2)
Application Date
July 11, 2011
Publication Date
September 16, 2014
Inventor
Timothy Robertson
Belmont
CA, US
Zahedeh Hatamkhany
San Mateo
CA, US
Patricia Johnson
Palo Alto
CA, US
David O Reilly
Palo Alto
CA, US
Hooman Hafezi
Redwood City
CA, US
Agent
Bret E Field
Bozicevic Field & Francis
Assignee
Proteus Digital Health
CA, US
IPC
A61B 5/00
A61B 5/1473
A61B 5/07
A61J 3/00
A61B 5/145
H01Q 1/27
H04Q 5/22
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