美國專利號碼 - 專利

By Madame
at 2010-05-14T13:46
at 2010-05-14T13:46
Table of Contents
想請問一下
版上的專家,有關美國專利號碼的意思
很抱歉這是我報告要用的
我有google過了…但是找到的資料真的有限
且開始有點混亂了
例如
US 6,541,321 B1
其中B1 代表發明專利
也有後面開頭是A的,這帶表示什麼意思?
D開頭的帶表是新式樣專利
但是我們要怎麼看出他的申請日期?
還有也有分純數字也是發明專利?
專利有通過跟沒有通過,要怎麼去分辨?
當中有哪些部份可以在詳細教一下
謝謝!!
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現在放棄,比賽就結束了!!
有危機就一定會有轉機.....
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專利
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