近年,给水排水领域每年都有近4000件专利申请,查阅2003年的专利年报,其中有关水、废水、污水及泥浆处理方面(C02)的专利申请有1733件,给水、排水方面(E03)的专利申请有1605件,这里还没有包括与其它专业共用的技术,如阀、泵、管等。其中,多数是非职务发明创造的专利,也就是个人 In recent years, nearly 4,000 patent applications have been filed in the field of water supply and drainage every year, and the 2003 annual report of the patent has been consulted. Among them, there are 1,733 patent applications for water, wastewater, sewage and mud treatment (C02), and water supply and drainage (E03) There are 1605 patent applications, which do not include the same technology as other professional, such as valves, pumps, tubes and so on. Most of them are patents created by non-service inventions, that is, individuals