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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| Application No. | Application Title | Issue Date |
| 20050135085 | Key-retainer with projection light A key-retainer with projection light includes key-ring, buckle and pendant hanging together each other; said pendant has a case and connecter, one end of said connecter is hanged together with said key-ring and buckle, another end is connected dismountable with the fron... | 06/23/2005 |