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US20090095208 |
Water drift compensation method and device
Current methods for station keeping an object in the ocean or body of water involve mooring assemblies or active and complex navigation and differential thrust or thrust and rudder assemblies. The...
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US20080250658 |
Compass with Leg Joint and Information Bearing Surfaces
A compass includes a leg joint and two compass legs provided at lower ends with holders for refills or styluses and articulated with one another at upper ends. An adjusting spindle penetrates the...
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US20080098607 |
PROFESSIONAL COMPASS RULERS
A ruler for drawing or measurement of circles, straight lines, and angles. The ruler body has a longitudinal slot in the middle and parallel with the length of the ruler. A sliding pen or pencil...
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