Which astronomer and mathematician invented the centigrade temperature scale, built the Uppsala Observatory, and published a collection of 316 observations of the aurora borealis?

Which Swedish priest designed and patented a rapid-fire revolver?

Which Swedish inventor and industrialist patented the multibarrel lever-actuated machine gun that later became known as the Nordenfelt gun?

Whose self-named company designed a mobile phone in 1956 that weighed 40 kg (about 88 pounds)?

Which Swedish pioneer in mechanical engineering invented the blowtorch?

Who received the Nobel Prize for Physics in 1912 for his invention of the automatic sun valve, or Solventil, which regulates a gaslight source by the action of sunlight, turning the gas off at dawn and on at dusk or at other periods of darkness?

Which Swedish-born American engineer designed the ironclad warship Monitor, which was used by the Union navy against the Confederacy during the American Civil War?

Who received the Nobel Prize for Chemistry in 1926 for his studies in the chemistry of colloids and for his invention of the ultracentrifuge, which is used to determine molecular weights?

Who invented the M-209, a portable compact encryption device that was hand-powered, which made it ideal for use by troops on the move?

Which Swedish professor and hemodialysis pioneer invented one of the first practical dialysis machines?

Which Swedish physician worked with his physicist friend Carl Hellmuth Hertz to devise a noninvasive method for examining the heart?

Who was the main inventor of Tetra Pak tetrahedron packaging, which was designed for storing, packing, and distributing liquid foodstuffs, such as milk and juice?

Who invented the Gamma Knife, a noninvasive surgical tool that uses concentrated beams of gamma radiation to control tumors or other disorders of the brain without harming surrounding healthy tissue?

Along with Nikola Tesla, which Swedish engineer is credited with inventing a three-phase electrical power system?