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Magician Harry Houdini patented a "Diver's Suit" enabling the wearer to "quickly divest himself of the suit while being submerged and to safely escape and reach the surface of the water."
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| Number | Title | Issue Date |
| 8131279 | Method and apparatus for interactive audience participation at a live entertainment event The present invention relates to methods and systems for providing interactive audience participation at live entertainment events. The method includes providing audience members with an interactive device that presents a promotional message and includes a user inte... | 03/06/2012 |
| 8023977 | Method and apparatus for interactive audience participation at a live entertainment event The present invention relates to a method for providing interactive audience participation at live entertainment events. The method includes use of an interactive device that presents a promotional message and includes a user interface, broadcasting audio programmin... | 09/20/2011 |
| 7587214 | Method and apparatus for interactive participation at a live entertainment event A method and apparatus provide interactive participation at live entertainment events. Enjoyment for a plurality of participants is enhanced. Participants employ wireless interactive devices that present a promotional message and include user input and output interf... | 09/08/2009 |
