Enhancing the performance of near-to-eye vision systems
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Large exit pupil wearable near-to-eye vision systems exploiting freeform eyepieces
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Methods and devices for demountable head mounted displays
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Safety Apparatus
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Improvements in or relating to Rimless Eyeglasses or Spectacles.
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Improvements in or relating to Eyeglasses.
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Improvements in or relating to Spectacle Glasses.
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Grease-retainer.
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Bracelet
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Improvements in or relating to the Inspection or Cleansing Openings of Sewerage Pipes or Chambers, Interceptors, Gulleys, Grease and other Traps and the like.
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Hammer-drill.
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Improvements in Apparatus for Perforating Templets for Marking Out Cloth and the like.