PER CURIAM.
The invention involved in this interference is an automatic train control system. There are six counts, of which count 3 is illustrative, and reads as follows:
"Count 3. In an automatic train control system of railroads having tracks divided into blocks, each provided with a normally closed track circuit, a permanent magnet on the track in each block and having coils associated therewith for neutralizing its external field, an electromagnet at...
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