Matches 201 - 250 out of 271 < 1 2 3 4 5 6 >
Match Document Document Title
3119270 Adjustable range transducer  
3054323 Automatic optical measuring instrument  
3045527 Eye cover attachment for monocular optical instruments  
3016800 Wedge for a double beam spectro-photometer  
3013470 Wedge structure for a double beam spectrophotometer  
3000262 Photoelectrically controlled rear mirror  
2999443 Optical filter compensation means coupled to exposure-responsive device  
2997595 Target-seeking head for guided missile  
2996952 Photographic recording apparatus  
2981140 Multiple image display system  
2979984 Shutter for pinhole detectors  
2958786 Transistor transducer  
2929871 Mask for facsimile scanner  
2897888 Movable closure for a slot  
2803162 Automatic exposure meter  
2794380 Stereoscopic camera optical system  
2792752 Method of and means for controlling light  
2791483 Galvanometer trace blocker  
2762259 Microscope diaphragm having an adjustable opaque central part  
2760049 Copy-line illuminator  
2724312 Means for obtaining three-dimensional photography  
2721259 Method and system for signalling having spectral modulation  
2694335 Photometric analyzer  
2667535 Method and apparatus for photoelectric sensing of permutated tape  
2661391 Mechanical color filter device for use in sequential television systems  
2648249 Frequency modulated photometer  
2593216 Automatic diaphragm control system  
2557691 Electronic function generator  
2543793 Three-dimensional intercommunicating system  
2528510 Color television  
2518743 Photographic sound recording system  
2504813 Diaphragm strip for film printing  
2457415 Color television  
2446738 View finder  
2441887 Antiglare vehicle attachment  
2424858 Colorimeter  
2380666 Telegraph signal transmission system  
2374991 Device for aiding night vision  
2371744 Eyepiece filter and diaphragm control  
2304191 Gravity meter  
2220198 Monitoring system  
2206853 Gear testing and recording machine  
2196597 Optical system  
2139295 Measuring and regulating device  
2120654 Moving picture camera lens substitution device  
2115271 Signal  
2076240 Spot and floodlight projector apparatus  
2029348 Headlight system  
2014193 Acoustic-electric-energy-converter and method  
1998461 Apparatus for reproducing sound  
Matches 201 - 250 out of 271 < 1 2 3 4 5 6 >