Methods and apparatus for electronic voting
US-11587386-B1 · Feb 21, 2023 · US
US9027840B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9027840-B2 |
| Application number | US-201113082513-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 8, 2011 |
| Priority date | Apr 8, 2010 |
| Publication date | May 12, 2015 |
| Grant date | May 12, 2015 |
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Official abstract text for this publication.
Systems and methods for the identification, powering and control of products and product packaging. The systems can include a point of sale display having a contactless power supply. The contactless power supply can provide a source of wireless power for products and product packaging. The products and product packaging can include light emitting diodes, e-ink displays and printed speaker circuits that activate as the operating frequency of the contactless power supply varies. Other embodiments include product level sensors, inductive reader networks, printed temperature sensors, product alignment systems, passive identification circuits and methods for controlling operation of the same.
Opening claim text (preview).
The invention claimed is: 1. A product sensor for use with an inductive reader adapted to generate a time-varying electromagnetic field, the product sensor comprising: a storage device for a product; a product sensor circuit separate from the inductive reader and supported by the storage device and including a secondary coil electrically coupled to a variable impendence element; and a heater element adapted to heat the product in response to the time-varying electromagnetic fi…
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