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US2581355A
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Optical aiming device for indirect artillery fire
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US2537962A
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Single eyepiece binocular
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US2462839A
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Waterproof watch setting means
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US2464209A
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Reflex sight with large exit pupil
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US2534225A
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Computing sight
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US2433338A
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Split field dual power telescope
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US2548861A
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Bore sight
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US2437677A
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Gun aiming post having parabolic reflecting surface
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US2388673A
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Dual power optical system
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US2491476A
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Collimating sight and reflecting aiming post for indirect aiming of a gun
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US2472091A
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Bore sight for insertion in the breech chamber of guns to provide overlapping imagesof muzzle portions of the gun bores
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US2385343A
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Fire control means
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US2450712A
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Multiple reticle collimating gun sight
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US2393308A
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Sight
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US2395843A
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Watch
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US2383466A
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Muzzle mounted bore sight
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US2419533A
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Bore sighting device including an apertured divergent lens
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US2422181A
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Periscopic bore sight
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US2391675A
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Stereoscope
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US2362611A
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Windshield construction
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