https://youtu.be/UWJoXbcIt1Q
https://youtu.be/7YZ-VWORLL8
1855- Kerosene is patented by Abraham Gesner.
https://m.youtube.com/watch?v=mTmw8yLiXLQ
https://youtu.be/eU_mzaGFmhw
https://youtu.be/RpASJXV138s
1964- The Patent is filed for the backhoe.
https://youtu.be/z2OwmKuJw1c
https://m.youtube.com/watch?v=ZXs_Jg0hN1g