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| Number | Title | Issue Date |
| 6398606 | Rescue apparatus A water or land rescue system is provided which includes a spring loaded firearm and rescue device. The firearm includes a barrel, a shoulder stock and a trigger. The rescue device is adapted to be releasably secured to one end of the spring situated with... | 06/04/2002 |
| 6230548 | System for testing properties of materials A system including methods and apparatus for measuring properties of a material, such as surface tension, surface energy, absorption, adsorption, permeability, porosity and printability and the like. A chemical marker containing test liquid is applied to ... | 05/15/2001 |
