1. 美国专利查询 United States Patent and Trademark Office http://www.uspto.gov/ (或者在google打入 US patent) 2. Issued Patents (PatFT) (full-text since 1976, full-page images since 1790) http://www.uspto.gov/patft/index.html 各种搜寻法要自己试试看, 一下子就上手 3. 这里会有两个连结, setup其中之一的软体才可以看影像档(专利文字及图片,可以列印) http://www.uspto.gov/patft/help/images.htm 例如查询 bogie (in title) 1 6,745,700 Radial bogie with steering beam mount unitized brake 2 6,732,841 Block holder for a bogie brake 3 6,712,549 Double-axis oscillating bogie wheels 4 6,682,280 Bogie wheel carrier 5 6,679,535 Safety wheel, method of manufacturing such a wheel and bogie equipped with such a wheel 6 6,666,446 Replaceable roller bogie for document feeding apparatus 7 6,601,520 Motor bogie for a vehicle having an integral low-slung floor 8 6,561,104 Bogie for rail vehicles with wheels with a variable track 9 6,523,481 Bogie for use with a monorail car 10 6,443,071 Drive bogie for a rail way vehicle and rail way vehicle equipped with such a bogie ............... 可以得到 133 项结果, 再挑选有兴趣的去看, 相信对社上的想走实力派的同仁有帮助 从美国专利火车相关的部分下手 --

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