Having worked for years in copyrights, trademarks, design and utility patents (Intellectual property law), I can tell you that if anything applied to this WSK knife of Tom Brown's, then Tops, it would have to be a design patent, not a copyright, trademark. A utility patent is the strongest protection, since both offensive and defensive claims are allowed, but I doubt such a patent exists. Harlow C. Platts has a
utility patent on his bifuricated (split) tang knives. It was a unique way to
construct a knife, not the knife's appearance. Henry B. Baer protected his design of the now familiar 15OT Deerslayer with a
design patent which only protected it's
appearance. Had anyone wanted to, they could well have modified his design and produced a similar knife. Design (and utility patents) are for a specified period of time, not forever. The idea of a patent is to assure the inventor a period of exclusive rights to a design. After that period expires, the design/invention becomes public domain, and anyone who wishes to can produce it.

The only thing that kept cutlers from making copies of the Deerslayer after the design patent expired was a respect for the Baers and Schrade Cutlery. The same goes for his Sharpfinger design.
Now, he might well have a copyright or trademark on the name Tom Brown Tracker, but can anyone show me the design patent for the TB WSK? What was it's origin date? Merely being the first to come up with an invention or ornamental design is not good enough.
Codger (
Master Patent Illustrator)