Abstract: A seed sorting machine contains a feeding area, a plurality of filtration units, a classification assembly, multiple guiding assemblies, a delivery unit, and at least one pressing rod. Each filtration unit includes multiple holding trays, a plurality of first partitions, and each holding tray has a filtering hole. The classification assembly includes a classifying tray, multiple guide sheets, and a plurality of outlets. Each guiding assembly includes a holder and multiple ribs, wherein between any two adjacent of the multiple ribs is defined a slot which corresponds to each of the plurality of outlets. The delivery unit includes a base on which multiple V-shaped grooves and multiple second partitions are arranged. Each pressing rod includes a plurality of rollers and multiple trenches, wherein each of the multiple trenches is defined between any two adjacent of the multiple trenches and corresponds to each of the multiple V-shaped grooves.

Abstract: A protective shell has a proper size, shape, and thickness to cover and attach to an anatomical joint or part. The protective shell is made of a material that is rigid, and that is partially or entirely transparent or semitransparent. The protective shell has an exterior face and an interior face, allowing for the application of graphics to be placed upon the interior face while viewing the graphics from the exterior face and protecting the graphic from being scraped off as a result of friction from a ground surface or with a collision from another object. The frontal external face is concave in shape to be less exposed to the ground plane and being scraped than the rest of the external faces of the shell while allowing the graphic that is placed upon the interior face to be viewed more clearly from the front of the exterior face.