Invention

  1. Who invented the phone?
  2. Scottish inventor Alexander Graham. Bell (1847-1922) devised the first apparatus capable of
  3. invention/who-invented-the-phone.htm
  4. How does the Gutenberg press?
  5. Johann Gutenberg was born in Mainz, Germany, in 1400 and died in
  6. invention/how-does-the-gutenberg-press.htm
  7. How are deaf and dumb?
  8. There are different degrees of deafness and this affects the use of
  9. invention/how-are-deaf-and-dumb.htm
  10. How does Braille?
  11. The braille system, devised by Frenchman Louis Braille in 1829, is a
  12. invention/how-does-braille.htm
  13. How does the radio?
  14. The operation of the radio is based on the transmission and reception
  15. invention/how-does-the-radio.htm
  16. When the car was invented?
  17. In 1860, Frenchman Lenoir patented the use of gas to operate the
  18. invention/when-the-car-was-invented.htm
  19. When did the wheel?
  20. It is believed that the man, inventing the wheel, was inspired by
  21. invention/when-did-the-wheel.htm
  22. What is the light bulb?
  23. It is a glass ampoule in which there is a metal filament,
  24. invention/what-is-the-light-bulb.htm