Here is the screenshot from the video I had published on YouTube on 10th of April 2013 that showed 5 words for Mt. Everest's location:
Additionally here is crowd funding campaign page on IndieGogo started on 11th of April 2013
Another record is available from archive.org.
The only effective difference is that What3Words uses three words while my system would take up around 5 words - but mine is more simpler and thus more effective as it uses words from a much smaller set of only 1024 very common and unambiguous words.
How do I get these patents invalidated?
I tried submitting a
third party observation but was unable to since the
priority date is past 28 months limit.
Update I: I submitted my documents under the
third party observation to the UK IPO office via email as per Submitting observations concerning the patentability of an invention. I then received an auto generated email acknowledging the receipt.
Update II: Sadly, the patent was granted as US9883333B2 on 2018-01-30