Engineering Instruments-Namely, Compensating Polar Planimeters, Radial Planimeters, Square Root Planimeters, Mechanical Integrators, Microscopes for Measuring Sugar Crystals, Optical Benches, Electronic Counters, Miniature Shaft Encoders, Digital Filar Eyepieces for Optical Microscopes, Digital Measuring and Positioning Adapters, and Drawing Instruments-Namely, Bow-Beam Compasses, Bow Compasses, Dividers