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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 |
| 6748686 | Channel letter and retaining clip therefor A channel letter has a rear surface for mounting against a raceway, wall, or a structure for supporting the signage, and sheet metal sides defining the figuration of the letter of shape to be depicted. A lighting element is positioned against the rear surface of the... | 06/15/2004 |
| 6481132 | Sign A sign has an enclosure including a transparent forward panel. Behind the transparent forward panel are upper and lower tracks for receiving a replaceable partially transparent panel having advertising material printed thereon. The enclosure has a removea... | 11/19/2002 |
