A COUPLE OF SUGGESTION
Now you can protect your works with this DWGLock software, the entities in the send out drawings can NOT be copied nor changed. However, recipients can open up the drawing, add lines and markups. Only the drawing owner allows extracting the drawing, if they need to, enclosing the added part with the native drawing. This is ideal solution for the collaboration needs and contractors.
It is a stand-alone application, no AutoCAD required; Supports AutoCAD R2.9 thru 2009 drawings. about $330.
CADLock, Inc. continues to create innovative solutions that enable you to maintain control of your intellectual property and
share it with those who need it. We invite you to download and evaluate CADVault® for AutoCAD®
to find out how digital rights management can work for you. THIS MAYBE PRICY also
Acme CAD Converter
Acme CAD Converter is a dwg/dxf/dwf format conversion software
for batch and vector files. It can conveniently convert DXF,DWF and DWG files into BMP, GIF,JPEG, DXF, DWG, SVG , PDF, HPGL etc., and also enable the conversion between DXF and DWG file versions (R2.5-R2005).