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GB191413009A
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Improvements in Sound Recording and Reproducing Instruments such as Gramophones and the like.
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GB191402006A
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Improvements in and relating to Gramophones, Phonographs or like Sound Reproducing Instruments.
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GB191328477A
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Improvements in Sound Recording and Reproducing Instruments such as Gramophones and the like.
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GB191203799A
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An Improvement in Separated Lens Systems for Photographic and Microscope Objectives and Lantern Projection Lenses.
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GB191119486A
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An Improved Method of Optically Uniting Lenses & Prisms and the like.
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US1013849A
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Short-base range-finder.
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GB191007392A
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Improvements in Optical Squares and the like.
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GB191006082A
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Improvements in Short Base Range Finders.
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GB190715200A
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An Improved Split Image Telescope for Short Base Range Finders.
|
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GB190713562A
|
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Improvements in Optical Squares for Range Finders & the like.
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GB190707322A
|
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Improvements in Short Base Range Finders.
|
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GB190607661A
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Improvements in certain Photographic Lenses.
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GB190524391A
|
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Improvements in Photographic Lenses.
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GB190512902A
|
|
Improvements in Short Base Range Finders.
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|
GB190503398A
|
|
Improvements in Certain Photographic and other Lenses.
|
|
GB190429561A
|
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A Method of Increasing the Brilliancy of the Images Formed by Lenses.
|
|
GB190412735A
|
|
An Improved Short Base Range Finder.
|
|
GB190323038A
|
|
Improvements in Short Base Range Finders.
|
|
GB190207225A
|
|
Improvements in Certain Photographic Lenses
|
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GB190114346A
|
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An Improvement in Sighting Apparatus for Rifles & other Guns.
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