In reference to the patent: US5876176
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 reference to the patent: US5669982
The challenge on Microsoft's patent US 20130063492 states: Availability for Challenge: Open Until at least Sept 14, 2013 How is the "available for challenge" date obtained? What steps must we ...