Multiple choice general knowledge science & technology

Who invented modern day O ring

  1. Timothy Eaton

  2. Thomas Edison

  3. Niels Christensen

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Niels Christensen invented the modern O-ring and received a patent in 1937. The invention became critical during WWII for sealing aircraft and military equipment. Thomas Edison is incorrectly associated with this invention.

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