IPR by itself can be a time-intensive process... 12-18 months easy.

Multiple IPRs can be filed against the same patents - even using the same arguments and by different companies.

You can get through one IPR (even have it refused by the PTAB) only to see another one filed. Patents are constantly being put under fire in this way.

Then we can talk about the court case... once the stay is lifted... months/years to get to trial, then waiting for final decision to be filed by the district court judge (after the jury has decided), then appeal to CAFC.

More IPRs can still be filed before the case is final.

Validity. Infringement. Damages. All 3 have to be proven and survive all appeals. It's a long hard road. Even longer when you keep starting over.

Litigation is just no way to run a business. Nothing is ever really 'proven', only argued indefinitely. What should be simple to you or me will be rendered not simple by the parties involved.

- Sinkman