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United States Utility Patents
5,302,820 - 5,302,829

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NumberTitle
5,302,820 Opto-electronic scale reading apparatus having an array of elongate photo-sensitive elements and a periodic light pattern
5,302,821 Encoder using a birefringent element and a system including the same
5,302,822 Quick attach clamp for photocells
5,302,823 Satellite solar band calibration source target apparatus
5,302,824 Measurement of relative detector gain
5,302,825 Franking machine and method of forming franking impression
5,302,826 Quadrupole trap improved technique for collisional induced disassociation for MS/MS processes
5,302,827 Quadrupole mass spectrometer
5,302,828 Scanning techniques in particle beam devices for reducing the effects of surface charge accumulation
5,302,829 Automatic focusing method for scanning electron microscopy



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