Navigational aid
Navigational angle-measurement device
Navigational assist system
Navigational charting and calculating device
Needlepoint sheet
Non-contact system for detecting an angle of rotation
Optical angle and torque sensor
Optical angle sensor
Optical protractor
Optical transducer
Orbital mission planning indicator
Ornamental fabric
Output rotational angle indicating device of rocking rotational
Overhead scanning profiler
Package sizer
Patent-drafting aid
Pattern forming apparatus
Perspective drawing templates
Photogrammetric apparatus
Photogrammetric plotter and constraint free drive system therefo