| 词汇 | usefulness |
| 释义 | `1`usefulness `2` "Nolo Everybody's Legal Dictionary": In patent law, the requirement that an invention have some purpose, or in the case of design patents, be ornamental. The purpose can be solely for amusement or a minor improvement on an existing design -- not every invention has to be a groundbreaking feat like the telephone. See Topic: Patent & Trade Secrets |
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