Matches 501 - 546 out of 546 < 1 2 3 4 5 6 7 8 9 10 11
Match Document Document Title
3294556 Tan ophthalmic glass  
3287825 Code game  
3289099 Coherent light oscillators  
3277494 Oscillograph with filter means  
3244075 Dispersive type optical filter utilizing light-transmitting fiber elements  
3242807 Ultraviolet absorbing composition  
3237006 Headlight device  
3228292 Filter wheel for portable infrared detector  
3220952 Spectral energy converting blue lacquer for photoflash lamps  
3209192 Decorative electric lamp with specular coating  
3206632 Electric lamp with a dip-coated fired layer  
3190172 Optical resonance filters  
3166672 System for transmitting messages by means of colored beams of light  
3146120 Absorptive glasses  
3143921 Photographic enlarger system  
3116885 Silicon rubber light filter for incandescent lamps  
3112490 Filter plate assembly for welding helmets and the like  
3104176 Optical filters and method of making same  
3078343 Television receiver comprising an optical filter  
3063861 Methods of manufacturing infrared transmitting filters  
3059051 Optical filters  
3053804 Linear polymeric metal chelates from bis(acetoacetates) and bis(acetoacetamides)  
3052153 Analyzing stresses in transparent articles  
3045124 Light responsive means  
3024381 Light filter and method of production  
3016306 Yellow filter layers for multi-layer photographic color elements  
3013114 Display device with contrast improving optical filter  
2992122 Light filtering high-index glass elements  
2942972 Photographic stencil negatives or positives  
2881663 Optical filters  
2864709 Packaged food product and wrapper therefor, which prevents the destruction of riboflavin in foods  
2837006 Angular discriminating optical viewing device  
2820918 Optical device for therapeutic and other purposes  
2816047 Method of making an optical filter and resultant article  
2809632 Mouth saver  
2801188 Coated gelating light filter  
2796799 System for monitoring moving picture production  
2793964 Method of rendering amber the surface of polyethylene plastic  
2792744 Method of comparing colors in printing and color contrast lenses used in same  
3588216 Title is not available  
3766080 Title is not available  
3588215 Title is not available  
3709765 Title is not available  
3826751 Title is not available  
3558213 Title is not available  
3675990 Title is not available  
Matches 501 - 546 out of 546 < 1 2 3 4 5 6 7 8 9 10 11