The potential for polymers to be extruded,
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Johnston needed to be dedicated in his conviction - and the effort required to ignite the enthusiasm of major manufacturers shows how difficult it really is for inventor / designers to secure the market that may be so well deserved. Johnson spent considerable amounts of his own capital in developing the boot and was successful in eventually seeing the Adidas 'Predator' (TM) going into production.
Johnston's eventual success with the Predator,
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Nike Tiempo, ultimately backed by Adidas - along with his understanding of the needs of the user - led to another ground-breaking 'detachable sleeve' boot design with the appearance of 'The Pig' in 2003. (