安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- Espacenet – patent search
Espacenet provides free access to over 120 million patent documents worldwide, enabling users to search, download, compare, and translate patents
- Espacenet – patent classification
Espacenet: free access to millions of patent documents Find out if your invention is unique or if other inventors have filed patent applications that are considered to be prior art
- Espacenet - Home page
Enjoy a seamless search experience and an application that adapts to the size format of your devices Search in all data, including full text, per default See your search query at all times and refine it whenever you want Browse the entire result list with abstract snippets and or drawings Navigate the result list and document details at the
- Espacenet - Home page
Get assistance advanced search My patents list Query history Settings Help Index Abstract "Also published as" documents Applicant Application number Bibliographic data Boolean operators Cited documents Claims Classification search Corresponding documents Country codes Coverage of the EP database Coverage of the WIPO database Coverage of the
- Espacenet - 主页
Espacenet: free access to the database of over 120 million patent documents
- Espacenet – help
Espacenet: free access to millions of patent documents Find out if your invention is unique or if other inventors have filed patent applications that are considered to be prior art
- Espacenet – help
International Patent Classification (IPC) Almost all patent applications are classified in this internationally recognised classification system It is maintained by the World Intellectual Property Organization (WIPO) and is used in more than 100 countries worldwide
- Espacenet - Home page
About Classification Patents are classified according to various classification schemes covering all possible technical domains When conducting a search, it is essential to systematically use this tool that offers an objective criteria to access relevant documents Keywords are much more subjective as there are many words to describe a same
|
|
|