- Patents for Inventions. Abridgements of Specifications Groups XXVII - XXXIV 460,001 480,000 Internal combustion, hydraulics Conveyers Lifts Railways Cycles Motor Vehicles Aircraft Ships

London, Her His HMSO, 1938. First Edition. Hardcover. Group XXVII Internal combustion, hot-air and combustion product engines Group XXVIII Gas pumps pipes etc Group XXIX Gas distribution hydraulics valves Group XXX Conveyers Lifts Railways Group XXXI Cycles Motor Vehicles Group XXXII Rail Road vehicles Group XXXIII Aircraft Ships Group XXXIV Brakes Wheels Good.

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