technically, the only propagation you can do on
plants that are marked that way are by pollination. (something that "might" occur any way)
but, with any
plant that will "drop" it's leaves and start babies from the dropped leaves, the only way to prevent propagation would be to destroy the dropped leaves.
now, do you have a legal responsibility to do that? no. can you sell the babies that are dropped? NO. can you divide your
plant to make it more suitable for you? yes.
but you can't sell the divisions or babies, and i wouldn't "label" them with the patented name if you give away a start.
plant developers spend years and major $$$ on their
plants, and while potting up a baby isn't wrong, flooding (or potentially flooding) the market with the
plants is.
does this help?