Abstract: A firearm suppressor includes a first section along an axis; a second section along the axis downstream of the first section, the second section having a second section twist rate; a third section along the axis downstream of the second section, the third section having a third section twist rate, the third section twist rate greater than the second section twist rate; and a fourth section along the axis downstream of the third section, the fourth section having a fourth section twist rate, the fourth section twist rate greater than the third section twist rate.

Abstract: Processes and systems for creating digital designs of patient specific dental appliances and parts thereof, such as dental bands and wires. After receiving an order for a dental appliance that includes data regarding the patient's teeth and optionally adjacent anatomy, the digital design of the dental appliance is automatically started by dental appliance design software using rules based logic. Thereafter, a human can continue, and in some embodiments complete, the digital design. Or the entire design can be completed by the dental appliance design software without any human intervention. The final digital design can then be used to create the patient specific dental appliance.

Abstract: A dental appliance, such as an orthodontic retainer or a dental flipper, made of metal, graphene, carbon, or carbon fiber, and techniques for forming the dental appliance are described. In the case of an orthodontic retainer, the retainer can be used to retain the upper set of teeth or the lower set of teeth. The dental appliance can be formed by an additive manufacturing process such as 3D printing.