Artificial limbs for medical instruction purposes; Bags adapted for laptops; Computer keyboard keycaps; Educational apparatus, namely, manipulative blocks used as teaching aids for the visualization of math concepts; Hand-held electronic units used to identify bird species and bird songs; Medical diagnostic simulators for use as teaching aids for laparoscopy; Medical teaching mannequins; Resuscitation mannequins; Scientific apparatus, namely, spectrometers and parts and fittings therefor; Tea...