DWPISM is an extensive database of value-added patent information, which opens up patents to end-users and information professionals alike by providing clear and concise abstracts for worldwide patent documents.
You are able to search DWPI using a wide range of criteria including free text, patent assignees and patent numbers; as well as by date, country of origin and the inventor's name.
You are also able to search DWPI using the following classification systems:
Fragmentation Codes
This detailed indexing system applied to pharmaceuticals, agrochemicals and general chemicals provides the searcher with comprehensive retrieval of chemical patents. The Fragmentation Codes describe both single and Markush compounds found in patent specifications on the basis of the structural fragments found in these compounds.
DWPI Classification System
Thomson Scientific categorises patent documents using a simple classification system for all areas of technology. Our subject specialists have consistently applied this unique classification system to all patent documents, since 1970. The DWPI classifications provide a uniform and accurate indexing tool that will allow you to effectively clarify ambiguous keywords and broaden or narrow your Subject/Keyword searches.
Manual Codes
The Manual Code system is a hierarchical classification system developed by Thomson Scientific to enable precise retrieval of chemical and electrical patent technology within the DWPI database. This system is the most precise way to search the DWPI database due to the technical skill and consistent indexing provided by our expert editorial staff.
Polymer Indexing
The polymer indexing in DWPI is applied to polymers and related chemicals (such as additives and catalysts in polymers). The polymer indexing gives the user precision in retrieval, incorporating both specific and generic searching of compounds encountered in the polymer area, by using a sophisticated system of linking concepts.
Polymer Indexing Guides
International Patent Classification System
The International Patent Classification System (IPC) is a hierarchical classification system produced by the World Intellectual Property Organisation (WIPO). This is the patent classification system used by patent offices throughout the world. It has been included in DWPI records since 1970. The IPC covers all areas of technology and is a useful system that will allow searching with greater precision.
IPC Reform
