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 |
| 7395136 | Robot end effector detachment sensor A robot device includes a sensor on its base plate capable of sensing rotation of the base plate occasioned by decoupling of a detachable joint that joins a forearm member of the robot to the base plate. The sensor produces an output signal which, if above a preset ... | 07/01/2008 |