People love Delphion…
Even i do..
But there are many things that Delphion doesn’t provide but other databases are very good at it…
For example, we all know that the old USPTO patents (early 1900s) are available in the image format and their text is not searchable. Further, we also know that they are not much useful when you are searching for some new technologies, such as mobile communication and semiconductors. However, they can turn out to be very important when the search is related to some new design. We never know if that design had already been patented by some person way back in early 1900s.
These early patents are not searchable on Delphion but these patents can be very easily covered by the databases such as Micropat and Google Patents who use their OCR (Optical Character Recognition) technology to bring these patents out in search results.
Recently we found very close prior art using this technique, which we used to invalidate one patent.
We can never take changes in invalidation so do use different techniques, we never know which strategy can yield good result.
