Here in Sigmatel we did get this explained to us the other day, so I ought to remember better really, but IIRC it's between $1000 and $3000 depending on how useful the patent looks to the company, and it's paid on granting, not filing. The Sonicblue (or was it DNNA? one of those lot) scheme of $5000 on filing and $5000 more on granting always seemed a bit over the top.

If you're setting up an incentive scheme at Numark, consider making it optional. When Sonicblue (or DNNA) tried (and thankfully failed) to patent parametric shuffle, they paid $5000 into my account without asking first, and I didn't feel clean again until I'd donated that exact amount to anti-patent groups to compensate.

Peter