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- vocal radio
- vulcanized rubber
- W A Shaeffer
- W E Hanford and Donald F Holmes
- W S Hadaway
- Wallace Carothers
- Walter Deemer (for Fleers in 1928)
- Walter Deemer (for Fleers in 1928)
- Walter Hunt
- waterproof raincoat
- Werner von Siemens
- Whitcomb Judson
- Wilhelm Roentgen
- Wilhelm von Leibniz and Isaac Newton
- Willem Einthoven
- William Coolidge
- William Fox Talbot
- William Levitt, who designed Levittown, Pennsylvania
- William Murdock
- William Otis