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3422670 CLEANING PROCESS AND COMPOSITIONS FOR POST-EMULSIFIER INSPECTION PENETRANTS  
3418855 APPARATUS FOR TESTING SHARPNESS OF NEEDLES  
3415112 Water-free penetrant inspection process and materials  
3412991 Reproducible position platform  
3408270 Method for non-destructive testing of materials  
3406122 Coating composition  
3406285 Method of inspection of soldered joints comprising using a volatile fluorescent dye  
3401556 Emulsifier for non-destructive testing methods  
3395573 Bottle inspection method and apparatus  
3393362 Process for detecting irregularities in a metallic surface  
3373683 Visual imaging of track-etched patterns  
3349495 Method of measuring simulated flaws in standard specimens  
3341010 Non-visible penetrant methods of flaw detection and apparatus therefor  
3329124 Drenching apparatus  
3326039 Apparatus for indicating shear-blade wear  
3301046 Method of obtaining permanent record of surface flow phenomena  
3299697 Tool condition detector  
3279243 Inspection method  
3264866 Rotating knife tenderometer  
3258957 Non-destructive testing of materials  
3243875 Billet inspection apparatus and method  
3243698 Non-magnetic surface irregularity detector using magnetic surface coating and magnetic detector  
3229513 Method for detecting defects on surfaces  
3216809 Method of analyzing glass sheets for cutting  
3194061 Instrument for measuring hardness of the surface of a resilient roll  
3191433 Surface condition testing method and apparatus  
3184596 Flaw detection method using a liquid solvent developer  
3181352 Machinability tester for foam plastic  
3164006 Evaluation performance of liquid penetrant tracer materials  
3162767 Method for nondestructive testing by using a defocussed electron beam  
3162040 Methods and devices for examining the flatiness or the exactly concentric cylinder-shape of a plane or cylindric surface, e. g. the active surface of printing-forms and/or of the supporting member thereof  
3161038 Strippable permanent thermographic test pattern  
3150519 Earth strata-hardness sensing systems  
3144601 Method of discovering and locating the position of localized electrically non-conducting defects in non-conducting materials  
3114039 Self-developing penetrant method of flaw detection and penetrant therefor  
3101147 Glass container inspecting apparatus  
3055205 Chip-per-tooth indicating system  
3049752 Device for obtaining impression  
3038329 Method and apparatus for detecting hidden flaws in sheet like structures  
3034334 Method of non-destructive analysis for latent defects  
3028338 Composition for detecting surface discontinuities  
3020745 Method of flaw detection in a metal member  
3020033 Inspection and control system  
3009100 Ascertaining surface condition  
2987670 Method of determining the efficiency of cutting fluids  
2984101 Tape method for detecting fatigue cracks  
2959471 Acid etch inspection process  
2953530 Method and compositions for detecting flaws  
2939963 Photoelectric inspection apparatus  
2925730 Blade edge deformation tester