Gross margin vs EBITDA?
Gross should be quite high (80pct certainly is not out of the question).
Depends on the level of G&A -- esp. legal, and how much they plow back into R&D.
Could look at QCOM for comparison ... although they are more mature in their lifecycle, there might be some useful patterns on how they ramped up monetization of their IP.
hth,
R.