Here at the British Library's Business & IP Centre we meet many inventors who are starting out on their journey through to patenting their inventions. The majority understand that their first action should be to search to see if their proposed invention is truly ‘new and innovative’ as it must be in order to obtain patent protection. What inventors will be searching for is known as ‘Prior art’ which is basically anything that shows the proposed invention is already known and is therefore not new. Prior art doesn’t have to be a patent, it could be a newspaper advertisement, a magazine or journal article or even a product on sale in another country. 

Most inventors will have heard of, and some may even have used, the Espacenet database. Espacenet is a patent search database containing data on over 100 million patent documents worldwide. Searching the database is fairly intuitive, but if needed there is a very informative Help section to aid the novice searcher. Espacenet is a great starting point for any would be inventor and is freely available via https://worldwide.espacenet.com.

What is generally less known by inventors is that here at the Business & IP Centre we subscribe to another search database that our registered readers can use for free. This database is the Derwent Innovations Index or DII as it is also known. 

DII is a search database that provides access to more than 30 million inventions as detailed in 65+ million patent documents. Once a search has been run, clicking through from the results list, users are able to view details of the relevant patent including any patents and/or articles cited as ‘Prior art’ against it. For most patents there are also links through to Espacenet to view the full published specification.

Espacenet also does this, so what are the advantages of visiting the Business & IP Centre and using DII? 

Well, it should be remembered that patents are technical documents which are written in such a way as to meet all the relevant criteria for obtaining a patent but, by providing only the most important information, give nothing away. 

With Espacenet you are searching the patents as published; the title or abstract, bibliographic data, description and claims all exactly as written in the original documents. This can make keyword searching problematic, not everyone will necessarily use the same keywords to describe the same subject, and often searchers will need to resort to classification searching to ensure they are searching in the correct technical area. Add to this the fact that patent titles can be slightly ambiguous and patent searching can become slightly more difficult.

With the Derwent Innovations Index (DII) what happens is that when a patent is published a member of the DII team who is experienced in the particular technical area covered by the patent takes the patent specification and does the following:

• Writes a more concise title that describes the invention and its claimed novelty
• Then writes an abstract giving a 250–500 word description in English of the claimed novelty of the invention
• Finally, DII also add their own ‘Class codes’ and ‘Manual codes’ to the records: Derwent Class Codes allow the searcher to quickly retrieve a particular category of inventions whilst Derwent Manual Codes indicate the novel technical aspects of the invention.

To give you a quick example of this, the title of patent WO2018064763 on Espacenet is ‘Compactable bicycle’ as shown below:

Espacenet Patent search

Whereas on DII the title is written as:

Derwent Innovations Index

The Espacenet bibliography and abstract looks like this:

Espacenet bibliography

Whilst the DII bibliography and abstract looks like this:

DII bibliography

Note: DII highlights, Novelty, Use and Advantage within the abstract.

Another advantage DII has is that using the Advanced search option searchers have the ability to ‘build’ a search by searching keywords, classifications, inventor/applicant details etc. and then adding search sets together as desired.

DII advanced search

Searchers then click on the live link in the Results box to view the results list from where they can select relevant patent records to save to a Marked list. Searchers can then email the results from the Marked list to themselves to view later if they wish.

With the Espacenet database searchers can download and print out copies of the front pages of relevant specifications (known as covers) or they can select titles from their search results list to export to either CVS or XLS. Copies of full patent specification can also be downloaded and printed out if desired.

Both Espacenet and DII are extremely useful for searchers. Each database has their own strengths and weaknesses, but if you visit the Business & IP Centre we will be happy to discuss your needs and show you how to get the best from both databases.

Maria Lampert, Intellectual Property Expert at the Business & IP Centre London

Maria has worked in the field of intellectual property since she joined the British Library in January 1993. She is currently the British Library Business & IP Centre’s Intellectual Property Expert, where she delivers 1-2-1 business and IP advice clinics, as well as intellectual property workshops and webinars on regular basis.