The hidden search engines of Google you don't know

When it comes to Google, many people think this is the world's largest search service. And with the company's three following search engines, the search will become really much easier than most people know.

Google's tools may or may not be used

Google Patent Search

Access address http://www.google.com/patents

This service will allow you to find more than 7 million patent applications from scientists both now and in the future. When you enter a scientist in the search list, such as: Albert Einstein, John Logie Baird, Newton, . and click Search Patens immediately those patent applications will appear for you to have viewable (full English).

Google Scholar

Address to http://scholar.google.com/.

Google Scholar is a service that allows you to find information about and topics related to your topic. The search results are mostly written in PDF, HTML or DOC formats so users can download and read easily

Google Books

Address accessible http://books.google.com/books

The service allows searching and viewing thousands of books online without necessarily downloading those books. For example, typing in the word Scientic, immediately thousands of books related to Scientic topic appear, you just need to click on the book to see that google will display images as well as the content of the book for you to enjoy it . However, Google does not always provide the full content of that book, but mainly depends on the terms of the publisher.