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EP1026476A1
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Portable self-levelling laser ray device
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US5724744A
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Self-leveling device mounted on a rotating base for projecting laser rays
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EP0729053A2
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Device for projecting a flat beam of diverging laser rays
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EP0656524A1
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Spirit level
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EP0622609A2
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Instrument for length-measuring by visible laser beams without physical contact.
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EP0619470A1
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Device for horizontally projecting a laser beam
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EP0617258A1
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Portable goniometer of the two pivoting arms type
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FR2692976A3
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GONIOMETER READING ON A DIAL.
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