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GB725508A
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Spectrometric apparatus
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GB727710A
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Anastigmatic objective
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GB723369A
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Mounting for telescope mirrors
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GB723367A
|
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Photographic objective
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DE901837C
|
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Anti-glare glasses for drivers
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GB723544A
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Objective
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GB703664A
|
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Interference microscope
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GB702290A
|
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Interference microscope for the examination of the surface of an opaque body
|
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GB698471A
|
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Tachymeter stadia rod
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DE878870C
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Storage for telescope mirror
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GB701819A
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Geodetic instrument
|
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GB696102A
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Device for production of uniform circle graduations
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US2663082A
|
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Device for production of uniform circle graduations
|
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DE866905C
|
|
Interchangeable screen for the room image display according to the time sequence method
|
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GB683750A
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Supplementary apparatus for microscopes
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DE874353C
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Electron lens with an electrode connected to high voltage
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DE876568C
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Electrostatic electron lens
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DE874344C
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Vacuum system, which is equipped with a forevacuum tank
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GB693643A
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Angle measuring instrument
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DE849017C
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Device for the photographic measurement of the spectral radiation absorption of liquids
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