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| Number | Title | Issue Date |
| 7202797 | System and a method for detecting, locating and discerning an approach towards a linear installation A system and a method for detecting, locating and identifying incidents of approaching a linear installation (e.g.—buried pipe line, railway, fence etc.), that includes plurality of sensing units positions in an array along the length of the linear installation, a... | 04/10/2007 |
| 6583721 | Intrusion detection fence with trip wires and common actuator An intrusion detection fence and system is provided. In one embodiment, the fence includes a plurality of trip wires secured between a pair of anchor posts, a plurality of detector posts anchored in the ground, located between the anchor posts, at least o... | 06/24/2003 |
| 4829286 | Security fence system A taut wire protective fence system, including a plurality of taut wires and a sensor, the sensor including apparatus for bending of an optical fiber in response to displacement of a taut wire, thereby producing sensible attenuation of light passing throu... | 05/09/1989 |
