However numerous patent disputes, and a blocking attempt by the radio Corporation of America, who thought it would destroy AM radio, halted its advancement.
但是很多对于专利的争议，以及美国的收音机公司对此的阻挠(他们认为调频收音机的发明会毁了调频广播)使之前的进步趋于停滞。
Along with the advancement of the era of knowledge economy, the patent has already been an important weapon for a person, an enterprise and even a country standing in subdues.
随着知识经济时代的推进，专利已经演变成为个人、企业乃至国家立于制胜点的重要武器。
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