World Patent Index WPINDEX

The World Patent Index of Derwent Information Ltd. is a broad collection of international value-added patent documents from 40 patent-issuing authorities. The bibliographic database contains 11.6 million patent records with 5.5 million images (October, 2002) and grows by 1.5 million patent documents each year. The classified and indexed documents (since 1963) are sometimes provided wdth additional abstracts or significant titles. 

---

Patents CAplus, Denwent Patents Citation Index (DPCI), INPADOC, PATDPA, USPATFULL, Denwent World Patents Index (WPINDEX). 

---