This article takes contrast united states patents and treatmark office retrieval system with google patents search from five aspects,which is the numbers of their patents,the retrieval mode,the results of search,and something relating to both the retrieval system.
从专利覆盖范围、专利检索方式、专利检索结果、专利检索结果和检索系统的相关性能五个方面对美国专利与商标局专利数据库和GOOGLE专利检索系统进行了比较。
Spatial discrepancy in patent-based innovation of environmental technologies;
基于专利的区域环境技术创新水平空间分异研究
Analysis on Patented Technology of Non-Oriented Electrical Steel Applied in China;
在我国申请的无取向电工钢专利技术的分析
Development of the patent policy in the field of biology in China and its analysis;
中国生物技术领域专利发展及其现状分析
A Brief Introduction of Foreign Patents about Electric Blanket;
国外电热毯专利文献介绍
Correlation between the numbers of patents applying and R&D payout of enterprises;
专利申请量与R&D支出之关系的定量分析
Present situation on the research of bio-diesel in China was introduced based on the comparison of physic-chemical properties of common vegetation and mineral oil,advantages and disadvantages of various production and relationship between diesel price and patents application.
在总结生物柴油的原料、生产方法和研究动态的基础上,比较了几种常见植物油与矿物柴油的理化特性和各种生物柴油的生产方法的优缺点及生物柴油专利申请情况与柴油价格的关系,提出:(1)几种植物油的理化特性与柴油的相比存在一定差异,而植物油之间差异不大,它们用于生产生物柴油的研究方法可以相互借鉴;(2)生物柴油的研究形势与0#柴油的价格密切相关,就各种方法看,酯交换反应法是最受关注的方法;(3)生产生物柴油的方法各有优缺点,但酯交换反应法由于其适应性强、反应条件要求不高等,是目前最经济最有优势的方法,但此法仍需改进。