Thanks to Ken for pointing this one out. A number of companies, including Surewest, AT&T, Cisco and Comcast are being sued by a company called BuyerLeverage for violating a pair of patents because they’re using Return Path as part of their mail filtering decisions. I pulled the docs (1-11-cv-00645-LPS). The patents all seem to center around a system where there is another layer between...
August 2, 2011
Patenting whitelisting, then suing people who use it
02August