Google Scholar allows interested users to make a search on, say "oil spills, " and receive research articles and patents or legal opinions and journals.

Google学术搜索允许用户输入某些关键词，然后可以得到科研文章和专利，以及法律建议和期刊。

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To complicate things further, search giant Google last year acquired Motorola Mobility - mainly for its patents.

BBC: Apple and Samsung patent cases dismissed

Google attorney Robert Van Nest said there was no inclination the search giant had infringed the patents until Oracle threatened litigation.

BBC: Oracle building