Applied Mathematics in Inventions

n 1963-75, among novelties described in his 600 patent applications and publications, S.I. Fishgal pioneered in functions approximation, hydraulics, pneumatics, ultrasonics, water engineering, machine building, construction, mining, autotracking, etc. Then he was made almost nameless, paperless and stateless. Surely, his unpublished works gone. Fishgal's other engineering books are "Rock Crushers Inventions", "Military Cable Layers-Extractors Inventions", "Applied Cavitation Inventions", "Applied Hydro-Impact Inventions", "Automotive inventions" and “Highways and Concrete Inventions”. His historical novels are "Piddler on the Hoof", "Kosher Hooks" and "Mein Krampf". Hopefully he is neither the worst inventor of novelists, nor the worst novelist of inventors.