Whilst fannying about on the www. today, I came across Wilkinson Swords patent for their original survival knife. We all know who came up with the concept, and it's interesting to see they credited him for it.
http://v3.espacenet.com/publicationDetails/originalDocument?CC=GB&NR=2171628&KC=&FT=E
http://v3.espacenet.com/publicationDetails/originalDocument?CC=GB&NR=2171628&KC=&FT=E