12. THE FOGHORN



Robert Foulis invented a steam-powered foghorn in 1854, but died penniless because he didn't patent it. Argh!

13. GREEN CURRENCY INK



Got a dollar? In 1862, Thomas Sterry Hunt invented the ink that makes U.S. bills green.

14. THE BAGGAGE TAG



John Michael Lyons of New Brunswick changed travel when he invented the first baggage tag in 1882. The revolutionary document contained information about the bag's point of departure, destination, and owner.

15. THE PAINT ROLLER



The paint roller has a messy history. Canadian Norman Breakey invented it in 1940, but an American inventor named Richards C. Adams tweaked the design and filed the first patent.

16. STANDARD TIME



Engineer Sandford Fleming brought standard time to U.S. and Canadian railways in 1883. Time zones became U.S. law in 1918 and were accepted worldwide by 1929. It was about time.

17. THE WHEELCHAIR-ACCESSIBLE BUS



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Walter Harris Callow, a blind, quadriplegic veteran, invented the first wheelchair-accessible bus in 1947. He took his first and only ride after death, when his body was transported for his funeral.