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GB127385A
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Methods of Mounting Lenses.
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GB128667A
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Improvements in Clinometer and Angle of Sight Instruments.
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GB125095A
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An Improved Variable Power Telescope.
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GB112784A
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Improvements in Periscopes.
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GB102985A
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Improvements in Machinery for Grinding Glass.
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GB191506352A
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Variable Angle Prisms.
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GB191503563A
|
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Improvements in Periscopes.
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|
GB191501727A
|
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Improvements in Optical Sighting Instruments.
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GB191422319A
|
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Improvements in Periscopes.
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GB191420215A
|
|
Improvements in Variable Power Telescopes.
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GB191412946A
|
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Improvements in Telescopes with Variable Magnifying Powers.
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GB191328991A
|
|
Improvements in Binocular Microscopes.
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|
GB191329977A
|
|
Improvements in or relating to Image Forming Combinations suitable for use in Optical Instruments of Various Kinds.
|
|
GB191303644A
|
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An Improved Method of and Apparatus for Determining the Speed of an Aeroplane or other Moving Body.
|
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GB191224159A
|
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Improvements in Apparatus for Taking or Projecting Photographic Pictures.
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GB191223234A
|
|
Improvements in View Finders or Picture Glasses.
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|
US1035408A
|
|
Lens for projection and photography.
|
|
GB191108607A
|
|
Improvements connected with the Registering of Sheets for Printing, Ruling, Paper-folding Machines and the like.
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GB191104714A
|
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Improvements in Photographic Lenses.
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GB191102619A
|
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Improvements in Lenses for Projection and Photography.
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