John Davis invented the backstaff and the double quadrant. He is more famous for the double quadrant, which people actually called the Davis quadrant. However, he is more famously known for being an English explorer.
John Davis was an English explorer who was born in 1550 and dead in 1605. In 1585 John began looking for the Northwest Passage and continued looking a couple years after. In 1586 he went to Labrador...
John Dunlop invented the pneumatic (inflatable) rubber tyre. Originally developed for his son's tricycle, the pneumatic tyre was later developed for commercial use in cars and larger vehicles.