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 |
| 7567794 | Peak picking in location systems Systems, methods and computer program products for accurately determining the location of people or objects are disclosed. The location of people or objects is calculated based on a received signal strength indication (RSSI). The distance between a transmitter and a... | 07/28/2009 |
| 7443300 | Antennas for object identifiers in location systems Transmitters or object identifiers are discloses that are able to radiate consistent power regardless of the object where the transmitters or object identifiers are placed. The transmitter or object identifier may include a vertical loop antenna. The loop plane of t... | 10/28/2008 |
| 7403111 | Location system using a first signal to gate a second signal A location system comprises a location determining module adapted to receive a first signal and a second signal. The location determining module is adapted to associate one of the signals with the other signal provided the first and second signals are received withi... | 07/22/2008 |
