- in Europe: http://www.bailii.org/ew/cases/EWCA/Civ/2002/1702.html
- in US: https://web.archive.org/web/20061205050434/http://eolas.com/...
But as I said, if your startup is being sued by Dolby, whether the enforcement is successful or not is actually irrelevant. Showing that your work doesn't infringe a patent, or that Dolby's patent is invalid, is a money and time-consuming process (unsurprisingly, patents are not generally written to facilitate re-implementation or defense).
(Moreover, in the US, in some cases, the patent owner might even get a preliminary injunction ( https://www.tms.org/pubs/journals/jom/matters/matters-9712.h... ), which might seriously and immediately harm your business. I don't know if such a thing exists in Europe).
Big tech companies like Dolby and IBM use a preventive racket-looking technique ; it involves trying to sell to potential infringers a "protective" subscription, but there's no preliminary analysis of whether there actually is any patent being infringed.
During broadcasting tech events like IBC or NAB, Dolby actually sends people to other company's booths for this ; and there's a famous story about IBM against small-at-this-time SUN : https://www.forbes.com/asap/2002/0624/044.html , whose gist is:
> "OK," [the IBM lawyer] said, "maybe you don't infringe these seven patents. But we have 10,000 U.S. patents.
> Do you really want us to go back to Armonk [IBM headquarters in New York] and find seven patents you do infringe?
> Or do you want to make this easy and just pay us $20 million?"