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作为发达的工业国家,美国专利发行的数量近年来几乎以几何级数增加。1991年3月19日美国专利商标局(PTO)发行了它的第500万个专利。美国创立后的前200年总共发行了400万个专利,而从1976年到1991年不到15年的短时间内就发行了100万多个专利。从1980年到1990年仅美国的年度专利申请就翻了一番多,即从每年84475件到每年174711件,预计到1995年向PTO提交的年度专利申请数将达25万件,这样一股信息洪流使
As a developed industrialized country, the number of U.S. patent issues has increased almost geometrically in recent years. March 19, 1991 The U.S. Patent and Trademark Office (PTO) issued its 5th patent. In the first 200 years after the United States was founded, a total of 4 million patents were issued, while more than 1 million patents were issued in a short period of less than 15 years from 1976 to 1991. From 1980 to 1990 alone, the annual patent applications in the United States alone more than doubled, from 84,475 a year to 174,711 a year. It is estimated that the number of annual patent applications filed with the PTO by 1995 will reach 250,000. The flood of information