Green Patents in Derwent World Patents Index

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Last week, we touched on green patent classification listings in our post about WIPO’s IPC Green Inventory. This week, we’ll look at a similar green patent classification listing: Derwent World Patents Index’s Green Technology Manual Codes. Come find out how these codes can help you find examples of green technology in your prior art search that keywords just aren’t turning up.

To understand how Green Technology Manual Codes work, it’s best to first get a grasp on what Derwent World Patents Index (DWPI) is. DWPI is a database of information including “over 18.9 million unique inventions covering more than 41 million patent documents, with coverage from over 41 major patent issuing authorities worldwide.” DWPI is accessible through several different search systems, including the Thomson Reuters owned Thomson Innovation, Westlaw, and Derwent Innovations Index or through a third party system such as Dialog, Questel.Orbit, Delphion, or STN. One of the most compelling aspects about DWPI is that it contains a large amount of value-added metadata information per record or patent. This value-added data includes rewritten titles and abstracts (for the sake of clarity and concision) as well as multiple fields of special indexing and classification, all of which is done by trained human indexers. Green Technology Manual Codes are part of the hand-applied special indexing and classification effort that goes into DWPI.

In fact, the Green Technology Manual Codes consist of a reference listing of pre-existing Manual Codes (see the link for a more complete description of Manual Codes) analogous to the listing of IPC codes in WIPO’s IPC Green Inventory.

One advantage the Green Technology Manual Code listing has over the IPC Green Inventory is that navigation is much less cumbersome: the codes are split up into six groups (Transportation, Power Sources, Fuels, Awareness, Pollution, and Recycling) but are not further hidden away by the expandable hierarchy that hinders the IPC Green Inventory. On the other hand, the relevant manual codes on the Green Technology page are not conveniently linked to an overall code hierarchy/listing (unfortunate) or instant search creation (impossible, since the user could not be guaranteed to have access to a featured system). Similar Manual Code indexes for Genetic Engineering and Nanomaterials are also available.

It’s worth noting that searching the Manual Codes related to Electrical or Mechanical subject areas are free; additional fees apply to searching Chemical Manual Codes. Despite this (and the fact that one must have access to DWPI in the first place), it’s well worth looking into DWPI’s Green Technology Manual Codes to go the next step beyond the freely available IPC classification codes used in WIPO’s IPC Green Inventory. The data is curated by human indexers separate from the examiners who assign IPC classifications. This provides a second data set to explore and check against the classifications you may already be familiar with. For those interested in providing the deepest and most comprehensive prior art search, this is a welcome option.

Have you tried out the Green Technology Manual Code index? How about WIPO’s IPC Green Inventory? Which one do you prefer? Let us know in the comments below.

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This post was edited by Intellogist Team member Chris Jagalla.


2 Responses

  1. […] Intellogist highlighted the industry trend of spotlighting green technology with our posts about Green technology in the Derwent World Patents Index and WIPO’s IPC Green Inventory.   Patents are an important source of technical information […]

  2. […] for the 2011 annual update, focusing on new terms for “green technology.” Ever the trendy topic, a focus on green technology in patent information systems continues to permeate more of the […]

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