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 |
| 6647556 | Adjustable helmet An adjustable helmet, particularly a cyclist's helmet having at least one longitudinal spar which is intended to be positioned above the parting, two end pieces one of which is intended to be positioned above the forehead and the other one above the back ... | 11/18/2003 |