Electronic key check for ensuring proper cradles insertion by respective processing board

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United States of America Patent

PATENT NO 4775930
SERIAL NO

06797318

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Abstract

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Keying check apparatus is provided for a control system including at least two microprocessor cradles, with each microprocessor cradle having a unique control program, and which keying check apparatus determines through operation with one of a first and second interrupt that the desired control program and the correct connections are provided for the CPU board of each microprocessor cradle.

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Patent Owner(s)

Patent OwnerAddress
AEG TRANSPORTATION SYSTEMS INC1501 LEBANON CHURCH ROAD PITTSBURGH PA 15236

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Clawson, Keith W Elizabeth Township, Allegheny County, PA 2 17
Roberts, Richard D Fremont, CA 101 2306

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