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Who made that toothbrush?

from The New York Times

"I don't have any of those toothbrushes that went to the moon," says Dr. Ben Swanson, former president of the American Academy of the History of Dentistry. He was speaking from his basement, where he stores his trove of 40,000 artifacts related to dental history. Swanson once dreamed of owning every kind of toothbrush in existence, but ended up stockpiling only a few hundred. "I had to give up because there were so many of them," he says. In fact, it would be nearly impossible to collect every specimen; the toothbrush is one of the most reinvented of human objects, with thousands of patents on file. more

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