美国专利在被批准之前，它的专利申请书内容是不公开的，在其他国家，经过八个月的搁置，就会公开出版专利申请书的内容。
In the United States, the content of an application is not published until the patent has been granted; in other countries, applications are published after eighteen months of pendency.
若发明是在提交专利申请之前以任何形式向社会公开过的，该申请将被拒绝（《欧洲专利公 约》第 54 条规定）。
If the invention has become publicly available in any way before the patent application was filed, the application will be rejected (Article 54 EPC).
使用当前分类查找授权专利和公开专利申请数据库，并阅读全文专利以及公开专利申请文件；
Search the Issued Patents and the Published Applications databases by "Current US Classification" and access full-text patents and published applications.
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