In reference to the patent: WO 2009/018016 A2 In this patent there are no drawings and no any practical implementation is shown. How would I understand the practical concept?
The EPO has so many publication dates for each patent: A1, A2, A3, A4. . . B1, B2, etc. Which should I use as publication date?
In EPO web site there's a definition of patent families page and, relating to this definitions, in other pages of the site it's stated about ESPACENET equivalents that: Definition of the Espacenet ...
A previous application for an European Patent Grant was "closed" by the European Patent Office. In which way the same application can be filled with US Patent Office?
I'm trying to understand the difference between a patent published in europe (or a publication with any country code) and an EP publication (published in EPO). What is the difference between ...