Patent office 'invalidates' key parts of so-called 'podcasting patent.'
Special interest groups are being blamed for killing bill aimed at curbing abusive patent lawsuits.
A new bill to address "abusive patent litigation" was formally introduced Wednesday and already has bipartisan support.
The EFF says it's found two podcasts that are three years older than Personal Audio's patent claim.
A company called Personal Audio patented the vague concept of podcasting, and it's threatening to take some podcasts down in court.
Last month Personal Audio filed lawsuits against three of the biggest podcasting companies, a move that could have a significant impact on the future of the medium.