The list for what you can do with 2D/3D CAD seems never long enough to fully encompass all its capabilities, but here is a short list to give you an idea of what I can do for you:
-concept design / drawings
-final product design / drawings
-revision / drawings
-assemblies / drawings
MACHINE / FABRICATION FILES
Depending on the fabrication method you’re using or planning to use, I can create the files that the machine-shop guys can load directly into their machines and production can start. No paper drawing required. For example:
-DXF files for sheet metal/press/water-cutter/laser-cutter/oxy-cutter
-STL files for 3D printers/CNC machining
I can be in contact with the machine-shop directly so the only thing you have to do is receive the final product!
I’ll be quite honest with you here: I cannot make a whole patent for you all by myself, at least I would advise against it. You really need some legal assistance here like a patent attorney. However, a legally trained person and me together can make a mean document, that’s for sure. Complete with the necessary illustrations and technical descriptions.