Around 11 years ago, there was a South African startup called Waytag [0] [1]. It was started by some business consultant guys, who I assumed didn't understand t

Around 11 years ago, there was a South African startup called Waytag [0] [1]. It was started by some business consultant guys, who I assumed didn't understand the lack of novelty in their idea (from a patent perspective). Their idea was similar, minus the algorithm. You could assign names to places, and people would use their proprietary system to find them. They filed for patents in various countries, US included. Here's their European patent: [2], status withdrawn. The US equivalent is patent US20120246195A1. I can't find its history, nor a post on Patents Stackexchange, to detail the history. Someone applied to have it invalidated, on the premise that there was existing prior art. My reading of the Patents question, is that this person filed an opposition in the UK. Has anyone ever tried doing same in the US? Or has some legal time lapsed? [0] https://ventureburn.com/2010/06/waytag-changing-the-way-we-use-location-services/ https://ventureburn.com/2010/06/waytag-changing-the-way-we-u... [1] https://news.ycombinator.com/item?id=10961677 https://news.ycombinator.com/item?id=10961677 [2] https://patents.google.com/patent/EP2488969A1/en https://patents.google.com/patent/EP2488969A1/en