Vital solid state controller

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9067609
APP PUB NO 20130277506A1
SERIAL NO

13921982

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Abstract

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A vital programmable logic device (VPD) is provided having at least two microprocessors. The VPD is configured to provide failsafe operation of a vital control system while operating in a closed circuit environment. In at least one embodiment of the present invention, railroad grade crossing signals are controlled by the VPD.

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Patent Owner(s)

Patent OwnerAddress
CENTRAL SIGNAL LLC2912 SYENE ROAD MADISON WI 53713

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ashraf, Ahtasham Lewis Center, US 8 226
Baldwin, David Madison, US 41 876

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