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US2911879A
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Comparator for superposing image of a grid on the image of an object
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US2697890A
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Method of and apparatus for mounting stereo slides
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US2666359A
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Stereoscopic viewer
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US2659149A
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Index clamp
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US2666360A
|
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Stereoscopic viewer
|
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US2615366A
|
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Film identifying device
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US2695553A
|
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Polarizing filter device for stereoscopic cameras
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US2562821A
|
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Heating device
|
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US2666675A
|
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Adjustable bearing
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US2620564A
|
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Clamp for telescopes of transits
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US2504454A
|
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Leveling device
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US2600266A
|
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Pendulum retaining means
|
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US2524178A
|
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Device for mounting pictures
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US2484591A
|
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Stereoscope
|
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US1781667A
|
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Surveying instrument
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US1882523A
|
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Combination level transit
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US1781666A
|
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Transit level
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US1655627A
|
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Convertible utility level
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