Matches 1 - 14 out of 14


Match Document Document Title
7408838 Digitizing planimeter  
A planimeter includes a movable housing in which are mounted orthogonally aimed x- and y-position sensors. Each position sensor comprises a piezoelectric ultrasound transmitter and receiver for...
6644814 LED-illumination-type DMD projector and optical system thereof  
A DMD projector of small size, lightweight and long life, which employs LED arrays as a light source for brighter screen. According to the projector, projection light from sets of a LED array, a...
6513257 Method and apparatus for determining scale in photographic images  
An apparatus and method for determining scale in captured images is disclosed. The apparatus includes a rectangular and generally flat frame device for determining scale in captured image. The...
5990809 Underwater surveying system  
The hydrography of a land area beneath a shallow body of water is determined by driving a submersible, remotely controlled, powered vehicle along a route over the land area. The vehicle includes a...
4754103 X-Y position indicator for a display system  
An X-Y position indicator control for manual movement over any surface to move a cursor over a display on a cathode ray tube, the indicator control generating signals indicating its position to...
4617740 Measuring device for a figure  
A measuring device for measuring characteristics of a drawing in which a carriage is supported by a pair of wheels for reciprocal motion on a line. A carriage pulse generator produces pulses...
4616419 Measuring device for a figure  
A measuring device to measure a figure in which a measuring lever is pivotally attached to a carriage supported on a pair of wheels for reciprocal movement. A locking device pivotally mounted on...
RE11568 Title is not available  
3403445 Polar coordinate chart reader  
3110967 Planimeter device  
3023505 Area measuring instrument  
2928178 Mechanical plotting and measuring apparatus  
2864170 Planimeter  
2796668 Internal planimeter  

Matches 1 - 14 out of 14