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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 |
| 6145502 | Dual mode of operation fireplaces for operation in vented or unvented mode A novel dual mode of operation gas fireplace of the type having a combustion chamber box and a heat exchanger is provided with a burner in the bottom of the combustion chamber box which creates exhaust gasses to be passed out of the combustion chamber box... | 11/14/2000 |
| 5931661 | Adjustable air/gas shutter valve An air to gas mixing valve is provided for fireplaces especially those having sealed combustion chambers as employed in direct vent fireplaces. The novel mixing valve comprises a channel shaped shutter which mounts on and is linearly slidable over a windo... | 08/03/1999 |
| 5832412 | Programmable digital frequency ultrasonic generator A digital programmable ultrasonic generator for driving an ultrasonic transducer includes a computer for receiving and storing a plurality of selectable programs. The programs are indicative of different modes of operation. A profile generator is coupled ... | 11/03/1998 |
