考研The longest extension ever granted was to Georges Valensi; his 1939 patent for color TV receiver circuitry was extended until 1971 because for most of the patent’s normal life there was no color TV to receive and thus no hope of reward for the invention.
有史以来延期时间最长的是乔治·瓦伦西;他1939年的彩色电视接收机电路专利被延长到1971年,因为在该专利的大部分正常使用寿命中,没有彩色电视可供接收,因此这项发明没有回报的希望。
1993年全国硕士研究生入学统一考试英语试题
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