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  3. A granted patent is the result of a bargain struck between an inventor and the state, by which the inventor gets a limited perio

A granted patent is the result of a bargain struck between an inventor and the state, by which the inventor gets a limited perio

admin2010-07-06  74
问题      A granted patent is the result of a bargain struck between an inventor and the state, by which the inventor gets a limited period of monopoly and publishes full details of his invention to the public after the period terminates.
     Only in the most exceptional circumstances is the life-span of a patent extended to alter this normal process of events.
     The longest extension ever granted was to George 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 hope of reward for’ the invention.
     Because a patent remains permanently public after it has terminated, the shelves of the library attached to the patent office contain details of literally millions of ideas that are free for anyone to use and, if older than half a century, sometimes even re-patent. Indeed, patent experts often advise anyone wishing to avoid the high cost of conducting a search through live patents that the one sure way of avoiding violation of any other inventor’s right is to plagiarize a dead patent. Likewise, because publication of an idea in any other form permanently invalidates further patents on that idea, it is traditionally safe to take ideas from other areas of print.  Much modern technological advance is based on these presumptions of legal security.
     Anyone closely involved in patents and inventions soon learns that most "new" ideas are, in fact, as old as the hills. It is their reduction to commercial practice, either through necessity or dedication, or through the availability of new technology, that makes news and money. The basic patent for the theory of magnetic recording dates back to 1886. Many of the original ideas behind television originate from the late 18th and early 20th century. Even the Volkswagen rear engine car was anticipated by a 1904 patent for a cart with the horse at the rear.
Which of the following is TRUE according to the passage?
选项 A、A patent holder must publicize the details of his invention when its legal period is over.
B、When a patent becomes out of effect, it can be re-patented or extended if necessary.
C、It is necessary for an inventor to apply for a patent before he makes his invention public.
D、One can get all the details of a patented invention from a library attached to the patent office.
答案A
解析 本文第二段对专利权下了这样的定义：一项被批准了的专利是发明人与国家之间达成的交易条件。它规定发明人在限期内有垄断权，并在到期后公布其发明的全部细节。因此选A。
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