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US5095386A
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Optical system for generating lines of light using crossed cylindrical lenses
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US5038260A
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Generator for generating one or more dots or lines of light
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US4836671A
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Locating device
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GB8510894D0
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Optical fiber coupling device
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US4618980A
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Exit beam indicator for radiographic equipment
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US4502147A
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Means for visually indicating an X-ray field
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WO8503212A1
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Improved means for visually indicating an x-ray field
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US4730895A
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Fiber optic line generator suitable for use with incandescent light source
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US4442533A
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Image plane indicator
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US4337502A
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Light beam producing device
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US4242587A
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Patient positioning device comprising light planes corresponding to first, second and third intersecting reference planes
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US4293771A
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Indicator for use with projected beam of radiation
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US4255657A
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Diverging plane positioning device
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US3861807A
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Position locating and maintaining method and means
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