Who invented gyro?

Related questions

1. Why do gyroscopes defy gravity?
2. Why does a rotating wheel not fall?
3. What are the three gyroscopic instruments?
4. What are the 6 basic flight instruments?
5. What is gyroscopic principle?
6. Do phones have gyroscopes?
7. Does iPhone have a magnetometer?
8. Why do phones have magnetometers?
9. What are the two gyroscopic principles?
10. Does iPhone 6 have gyroscope?

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