Filtration is a vital part of many parts of life, from water to air to critical applications, and the technology is still evolving. Additive manufacturing is now here to improve upon the production of filters. Croft Additive Manufacturing (CAM) responded to clients' requests to improve filtration technology. They've already seen success in their designs, such as the "Straightliner Filter" and one with "bugtraps." Check out details about this company and its techniques in the full article: http://3dprint.com/33462/3d-printed-filters-cam/ ‎
Below is an image of CAM's Straightliner Filter design: