There are few inventions as simple, yet as ubiquitous and iconic, as the Bunsen burner. Bunsen's invention is nearly synonymous with chemistry, and this year the inventor is 200 years old:
How many other inventions have had that kind of longevity, carry the inventor's name and are still in widespread use? The Geiger counter comes to mind, but it is half as old. The Gatling gun is another. What else?