Superstar singer Michael Jackson co-patented a "Method and means for creating anti-gravity illusion" in 1993.
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| Number | Title | Issue Date |
| 4061347 | Shock-absorbing ski pole grip A shock-absorbing ski pole grip is provided that includes a return spring, a retaining element or screw for holding a piston, cylinder and shaft to a grip, and a piston that is movably mounted in a cylinder on the upper end of the ski pole shaft.... | 12/06/1977 |