专利保护期限的设置是这二者之间权衡的结果。
The duration of patent is a result of tradeoff between these two sides.
在一些国家，发明专利的保护期限是20年。
In some countries, the patent right duration for invention is 20 years.
至于实用新型专利和外观设计专利，保护期限更短，只有5年。
For utility models and designs, the duration of protection is even shorter, only five years.
至于实用新型专利和外观设计专利，保护期限更短，只有5年。
For utility models and designs, the duration of protection is even shorter, only five years.
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