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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 |
| 7570013 | Rechargeable battery pack, in particular for use with electrical hand tool devices, charging device, and rechargeable battery pack and charging device system A rechargeable battery pack (20), in particular, for use with electrical hand tool devices, comprises a first and a second charging connection (24, 26), and a third control connection (28), all three being connectable to a charging device (46... | 08/04/2009 |
