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Across
  1. 3. (born November 20, 1945)[2] is an American scientist, private pilot and author
  2. 4. (February 11, 1936 – March 12, 2022) was an inventor and businessman whose career was focused on bringing barcode technology into the mainstream
  3. 6. He is most famous for his "Bobs" series of roller coasters that featured severe banking, steep drops, and nonstop action.
  4. 9. an American inventor and engineer who invented the modern form of the aerosol spray valve
Down
  1. 1. was a prominent early American experimenter in wireless telephony and prolific
  2. 2. The first African-American to run the marathon at the Summer Olympics (the 1952 Olympics in Helsinki, Finland)
  3. 5. line of photo flash accessories and is the author of several books on flash photography.
  4. 7. He helped develop the video tape recorder while at Ampex and was the founder of Dolby Laboratories.
  5. 8. (1873–1950) was a pioneer of music recording and cinema. As a cameraman and director of productions at Edison's first studio,
  6. 10. is an American optical engineer, inventor and entrepreneur. He is the founder of optical equipment