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US2076103A
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Apparatus for producing cinematographic combination films
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US1961309A
|
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Ophthalmoscope
|
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GB368370A
|
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Improvements in or relating to the reproduction of multiple images in color photography
|
|
US1909731A
|
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Method of and apparatus for taking and projecting multiple images such as are used in color photography
|
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US1918788A
|
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System for projecting motion pictures
|
|
GB339035A
|
|
Improvements in or relating to sight testing apparatus
|
|
US1826844A
|
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Telescopic instrument for subjective determination of the refraction of the eye
|
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GB309137A
|
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Improvements in the method of and system for taking combined photographs from a plurality of scenes
|
|
US1564295A
|
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Cinematographic apparatus
|
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US1552895A
|
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Sighting telescope
|
|
US1510114A
|
|
Apparatus for the objective determination of the refraction of the eye
|
|
GB156809A
|
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Improvements in devices for the objective determination of the refraction of the eyeby means of focal illumination of the retina
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