1972 – Free Roving Machine – M. F. Huber (British)
Wireless World, December 1972 Free Roving Machine by M.. F. Huber, B.Sc. A device which will "explore" a room and by finding and tracing the path of a length of tape laid on the floor, return to a charger at intervals to recharge its batteries A number of years ago, Dr. Grey Walter first demonstrated …
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