In the Patent School, the classification of grades and class is numerous and complicated. And it has different catalogues in different countries. The first destination is the vagary dream land---the United States of America.

Hundreds of years ago, people all over the world rushed to this magic land to look for their dream. Great leader Martin Luther King, Jr. once upon gave a famous speech 'I have a dream".

 Maybe the predecessor's enterprising and innovative and brave sprits inspire us, the United States of America always hold on the pressure belief to do everything, and thus the country get all world people's attentions. Not to say it's a powerful scientific and technological country. 

The unique culture, strong academic background, perfect law system and democratic government policy, all those advantages give Americans freedom and sources to innovate things. In the world of patent, it's the best both from the aspects of quality and quantity. How does it achieve this fabulous state? What can be learned from it? Today let's go inside, analyze and find the mystery together.

Patents are labeled according to geography or its function. There are UK patents, Canada patent, Korean patents and Australian Patents and etc. If you want to search the patents from the geography aspect. Speaking to the second method, different countries name different patents. For example in the United States of America, there are Utility, Design and Plant, while cross the Pacific Ocean, in the mysterious China, it has innovation, design and New and Practical patent.

In the United States of America the patent system is very perfect, on the website of the national patent office-United States Patent and Trademark Office (USPTO), you can search the patent database even date back to 1790, full text and other visual types are available on the website. However not all the info is convenient from the website, can publics go to the institute to look for the materials they need just like a library does? The answer is "Yes". USPTO allowed local institutions collect and spread the patents and trademarks materials to public for free. And they have to hand over a certain fees to USPTO every year. 

With Patent and Trademark Depository Libraries (PTDLs), you can check if your innovation has been patented or trademark has registered on your product or commercial service. Besides you will get the trained workers' help about the applying for patent, form fillings, process of application and other related questions, but legal advice is exceptional there, to further help service I suggest you hire a patent lawyer to assist you to obtain a patent. Normally speaking the patent lawyer salary is very pleasant in USA.