You may not be familiar with the name of eccentric millionaire Dean Kamen, but you will know his most famous invention - the Segway. Kamen has achieved far more in his life than just creating the Segway, but even if he never did anything else, that creation will keep all of his bills paid forever. Kamen paid an eye-wateringly high price of $2.5m for a tiny two-acre island called North Dumpling off the east coast of the USA in 1986. He wanted to build a wind turbine to fuel it, but New York refused to give him permission, so he did the only sensible thing. He declared independence.
Kamen's old friend (and then-serving President) George Bush jokingly signed a treaty of non-aggression between the USA and Dumpling Island, and from there Kamen has created a flag, a miniature replica of Stonehenge, a national anthem, a daily newspaper, and a one-boat navy. Visitors to his island are invited to commemorate the occasion by leaving an imprint of their own buttocks. No, we're not joking!
When we think of inventors, the image that comes to mind is usually that of a frazzled scientist toiling away in a lab, not celebrities pulled from the pages of Us Weekly. However, a number of well-known public figures hold patents for various innovations. Some are related to the work that made them famous, while others are offshoots of hobbies or just a single great idea.
Part of guitar wizard Eddie Van Halen's signature sound was his two-handed tapping technique, but letting all ten fingers fly while simultaneously holding up the guitar's neck could get a bit tricky. Van Halen came up with a novel way to get around this problem, though; he invented a support (top) that could flip out of the back of his axe's body to raise and stabilize the fretboard so he could tap out searing songs like "Eruption." While Van Halen was obviously interested in improving his guitar work, the patent application he filed in 1985 notes that the device would work with any stringed instrument. Want to tap out a scorching mandolin solo? Find someone selling Eddie's device.
It’s probably not surprising that James Cameron—who designed a submersible to take him to the deepest known part of the ocean—will often invent technology to make his films if what he needs doesn’t exist. He holds a number of patents, including US Patent No. 4996938, “apparatus for propelling a user in an underwater environment,” that he and his brother, Michael, created to film The Abyss and patented in 1989. The device is basically an underwater dolly equipped with propellers that makes it easy for a camera operator to maneuver in the water—and allowed Cameron to capture the shots he wanted for the 1989 film, part of which was filmed in an abandoned nuclear reactor.
In 1987 Jamie Lee Curtis designed and patented a disposable diaper that included a waterproof pocket that held baby wipes. She hasn't profited from her idea yet, though, since she refuses to license the patent until diaper companies make biodegradable products.
You know him as a rock legend, but Neil Young also loves trains—so much that he owns a stake in a model train manufacturing company and has an extensive collection. He also holds seven patents related to model trains, including Patent No. US5441223, "Model train controller using electromagnetic field between track and ground."