Instructions available at:
http://www.instructables.com/id/Make-a-Permanent-NYLON-3D-Printed-Coffee-Filter/
Here is the design of the filter:
http://www.thingiverse.com/thing:24005
Here is the different type of filter:
Source:
http://bza.tumblr.com/post/88000487342/testing-3dprinted-reuseable-coffee-filter
You can also use more complex 3d printing techniques to make your own DIY electric coffee maker:
http://diy3dprinting.blogspot.com/2014/06/diy-electric-coffee-maker-made-with.html