A gun that fires a missile, powered by gas "discharged by the operator of the toy."
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| Number | Title | Issue Date |
| 7204930 | Water purification system and method An oxidation filtration system for cleaning groundwater, the system having an aeration tower and a filtration tank. Within the filtration tank is an upper chamber and a lower chamber. Contained within the lower chamber is a plurality of Styrofoamâ„¢ filter media. Se... | 04/17/2007 |