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US1174547A
(en)
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Method of and apparatus for testing visual acuity.
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(en)
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Gunfire control training apparatus
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SE128226C1
(enrdf_load_html_response)
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US2420633A
(en)
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Instrument for testing and developing the stereoptic acuity of a person's eyes
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(en)
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Automatic protracting apparatus combined with two computing theodolites
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(en)
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Apparatus for plotting maps from photographs
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(en)
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Apparatus for use in the laying of antiaircraft guns
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US1974654A
(en)
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Comparison magnascope |
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(en)
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Lens-testing instrument
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(en)
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Projection system
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(en)
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Projecting apparatus
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(en)
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Bomb sight
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(en)
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Range controlled speed indicator
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(en)
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Navigation apparatus for aircraft
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US1404662A
(en)
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Clair |
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(en)
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Anti-aircraft-control system
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US2965979A
(en)
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Training device for mark 14 gunsight
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(en)
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Sighting device for ordnance
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(en)
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Range finder for submarine and other periscopes
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(en)
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Apparatus for determining the course of aircraft
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US1483489A
(en)
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Signaling system for warships
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US1817907A
(en)
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Position comparator
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US1762800A
(en)
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Fire-control apparatus for firing at movable targets
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US1297967A
(en)
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Apparatus for training range-finder operators.
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US1232968A
(en)
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Apparatus for determining sighting data for naval guns.
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