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DE2735923A1
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DEVICE FOR MEASURING THE LARGEST APPROXIMATION BETWEEN TWO RELATIVELY MOVING OBJECTS
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US4191953A
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Intrusion sensor and aerial therefor
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GB1521954A
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Surface acoustic wave device
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US4054867A
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Detecting damage to bulk material
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GB1508129A
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Application of photosensitive material to an article
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GB1473661A
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Surface acoustic wave device
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ZA7402187B
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Sensor device and system incorporating same
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GB1475111A
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Intrusion sensor
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GB1489873A
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Device including ferrimagnetic coupling element
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GB1465906A
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Supporting ferri-magnetic film
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GB1462058A
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Radio frequency screening and means therefor
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ZA7307410B
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Presence detector apparatus
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IL43260D0
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Presence detector apparatus and door opening system comprising it
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GB1439820A
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Group delay equaliser punched card reader
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DE2335772A1
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Break-in detection supervisory system - has sensors with defined working frequencies hidden in interference on a common circuit
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AU5484873A
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Infrared detector device and system
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GB1441171A
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Digital data transmission
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CA991739A
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Detecting damage to bulk material
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GB1402530A
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Detecting damage to glass
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GB1402419A
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Target detection system
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