I haven`t see, but is it possible. I think it should because if you put backlinks only to one page of the website, than that page should get better PR then the domain.
Yes its possible. If there are better backlinks sent to the inner page more then the domain the inner page will have a higher PR. Remember PR = Page Rank and not domain rank.
It is possible yes, and it does happen. But not very often because people usually only link-build to their home pages.
I was thinking the same, i good to know, I have made better link building strategy to a category in one of my websites then the home page of the website . I know that PR is not domain Rank. Is just the importance that google give to a certain page.
Yup. Most of the cases, Index Page have higher PR compare to Inner Pages since most of us prioritize to promote / link build the index Page. But, there are cases wherein a product or service page of a website is prioritize. These are the inner pages that usually get higher PR compare to its index.