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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7492266 | Systems and methods for locating hospital assets A VoIP communicator utilizes an ultrawide band frequency, sufficient to determine a location of the communicator to within 1 meter, 0.1 meters, or less. The communicator preferably includes a display screen that displays a rich colored asset map. Several novel softw... | 02/17/2009 |
