I need some input regarding Prior Art. I have found some abandoned patents with almost similar invention to a US Patent with number WO2005065109A3.
It is possible to invalidate the patent by using previous patent from European country since the invention is no longer new anymore, and they were already exist that kind technology in German, French and Netherlands.
Please give some advices.
The Patent number that can be prior art documents are : - DE 19708178 (German) - EP 1477326 A1 (Netherland) - EP 1657676 A2 (French)