As already the 29th application by CAD Studio published in Autodesk Exchange Apps store, the AutoCAD add-on DWGsign was released recently. CADstudio DWGsign is a simple to use AutoCAD utility which watermarks your DWG drawing document with a unique, permanent and invisible silent signature containing your name or the name of your company. This add-on tool helps to protect your intellectualGo to the original post...