Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 5774052 | Monitoring and alerting system for buildings A system is disclosed for sensing selected conditions particularly for an unoccupied commercial business and taking the appropriate action. Corrective action may include shutting down a system, sending a signal to an occupied location for evaluation of th... | 06/30/1998 |
| 5596934 | Seismic restraint system A seismic restraint system for vault located bank safety deposit box modules and the like. This system includes a beam or strongback which extends along the top of a row of safe deposit box modules. A series of adjustable columns bear against the beam and... | 01/28/1997 |
