Just out of curiosity, did a few google and google scholar searches for watermarking nurbs, opennurbs, and rhino.
From: http://docs.mcneel.com/rhino/5/help/en-us/commands/applywatermark.htm
"Disclaimer
Robert McNeel & Associates provides the watermarking tools "as is," without express or implied warranty. All implied warranties of fitness for any particular purpose and of merchantability are hereby disclaimed.
Robert McNeel & Associates will not disclose any more details about watermarking."
