1988年10月13日,西安市某中等专业技术教师余某向中国专利局提出一项名为“漏斗”的专利申请。经中国专利局审查,认为此项申请符合授予专利权的条件,逐于1989年10月25日发给余某“漏斗”的实用新型专利证书。余某获得专利证书后,与咸阳某塑料厂就“漏斗”技术的开发生产和销售达成一项协议,双方约定:余某将他的“漏斗”专利技术资料提供给塑料厂,塑料厂开 On October 13, 1988, Yu Mou, a middle-level professional and technical teacher in Xi'an, submitted a patent application entitled “Funnel” to the Chinese Patent Office. Upon examination by the China Patent Office, the application is considered as conforming to the conditions for granting the patent right, and is hereby granted to the utility model patent certificate of “funnel” on October 25, 1989. Yu a patent certificate, and a plastic factory in Xianyang on the “funnel” technology development, production and sales reached an agreement, the two sides agreed: Yu Mou will be his “funnel” patented technical information provided to the plastic factory, plastic factory opened