Coen said:
Now we just need someone to make a mold, sell the product and NOT get sued by Tanos or Bott.
I remember cardreaders that were fully compatible with XD cards without claiming to be, to get out from under excessive licensing fees.
I believe one can make a -compatible- railing as long as it does not copy the Bott rails themselves - assuming they are even patented.
As in something that fits the TANOS/BOTT rails in the systainer
yet is not a verbatim copy of their product, nor does it claim to be a product of theirs. I believe there were a bunch of rulings to that effect relating to car parts where the third party was - by definition - allowed to make a compatible part as the shape of the interface of a product was deemed by definition non-patentable. Or something like that.
By that philosophy one can extend/expand the use of a patented product but is not allowed to copy it or its protected function. I believe the Metaloc cases are a good example - they are fully compatible with T-Locs but use a different approach to joining, thus being "patent-free" vis-a-vis TANOS.