Converting a file into a PAT (AutoCAD hatch pattern) file isn't a direct "Save As" process because PAT files are specialized text definitions of repeating geometry. Best Online & Software Converters
A vector file format used to store 2D and 3D design data, including hatch geometry.
Built directly into AutoCAD; no installation required.
A plain text file containing code that defines repeating linear patterns for AutoCAD fills.
There are several methods to convert DWG to PAT, including: