Serbian-American inventor Nikola Tesla was born in July of 1856, in what is now Croatia. He came to the United States in 1884, and briefly worked with Thomas Edison before the two parted ways. He sold several patent rights, including those to his alternating-current machinery, to George Westinghouse.
When there was a cotton shortage during World War I, Kimberly-Clark developed a thin, flat cotton substitute that the army tried to use as a filter in gas masks. The war ended before scientists perfected the material for gas masks, so the company redeveloped it to be smoother and softer, then marketed Kleenex as facial tissue instead.