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US3643946A
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Toy football game
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GB1102550A
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A combined serving and gaming table
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GB895680A
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Improvements in or relating to a force measuring device
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GB840706A
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Improvements relating to coin-operated apparatus for indicating a magnitude or a result of combined magnitudes
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GB838563A
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Apparatus for determining the capability of a person to distinguish between tones separated by a small interval
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ES235643A3
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Device for the measurement of the rapidity or time of reaction of a person (Machine-translation by Google Translate, not legally binding)
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GB786414A
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Physiological reaction time meter
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GB664503A
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Improvements in timing devices
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