- Christian Huygens invents a pendulum clock.
- Cuckoo clocks made in Furtwangen, Germany, in the Black Forest region.
- James Gregory invents the first reflecting telescope.
- Isaac Newton invents a reflecting telescope.
- Gottfried Wilhelm Leibniz invents a calculating machine.
- Anton Van Leeuwenhoek was the first to see and describe bacteria with a microscope.
- Christian Huygens patents the pocket watch.
- Robert Hooke invents the universal joint.
- Denis Papin invents the pressure cooker.
- Englishmen, Thomas Savery invents a steam pump.