Devices in order to be successfully marketed, must have as great an element of timeliness as of ingenuity; field still open to clever and practical discoverers; history of four-wheel brake development; similar development beginning with gear shifting.
Few original inventions survive in their first form
Automotive Industries
Automotive Industries ; 61 , n 21
1929
Aufsatz (Zeitschrift)
Englisch
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Great inventions and their effects
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