Multiple choice general knowledge science & technology

Who invented Liquid Paper?

  1. Mary anderson

  2. Mary Kies

  3. Bette Nesmith Graham

  4. Margaret Knight

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bette Nesmith Graham, a secretary, invented 'Mistake Out' (later Liquid Paper) in her kitchen to correct typing errors. Mary Anderson invented windshield wipers, and Margaret Knight invented the flat-bottomed paper bag machine.