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US3689937A
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Recording styli and control circuits for styli
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DE2039954A1
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Pen and recorder for making recordings on a thermosensitive medium
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GB1286092A
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Improvements relating to recording apparatus employing a thermal stylus
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GB1212348A
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Improvements relating to insulation testing
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GB1222963A
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Improvements relating to insulation testing
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GB1174084A
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Electronic Analogue-to-Digital Converters
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GB1189657A
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Improvements relating to Frequency Modulation Receivers for Data Transmission.
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GB1127387A
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Improvements relating to electrical circuits for time-sharing systems
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GB1169365A
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Improvements relating to the Measurement of Flow of Liquids or Gases
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GB1126522A
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Improvements relating to telemetering apparatus
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GB1101942A
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Improvements relating to data transmitter systems
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DE1437648A1
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Converter
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GB1145301A
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Improvements relating to motor control systems
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GB1117504A
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Improvements relating to the measurement of the surface level of liquids
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GB1134748A
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Improvements relating to the control of fluid or gas flow
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GB1121613A
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Improvements in or relating to electronic switching circuits
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GB1101122A
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Improvements relating to data transmission systems
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GB1023877A
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Improvements relating to differential pressure cells
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DE1197317B
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Adjustment of a lens with variable focal length and image size
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GB1003444A
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Improvements relating to the measurement of electrical resistance
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