Offers full-text of US patents from 1976 to date with a variety of different search mechanisms. Provides access to the full-text of over 1.4 million patents. Mediated online patent searches For a more comprehensive patent search of some commercial online patent databases you could use the Library's mediated online search service. The online search service is a charged service and patent databases are very expensive to search. The average cost of an online patent search is about 60 - 80.
Extensive searches can be even more expensive.
There is a numerical patent index with patent numbers listed under their country of origin. A corresponding volume and abstract number refer to the patent abstract in the main Chemical Abstracts sequence. A charge is made for the use of this service, ask at Information and Enquiries on Level 3 for further details. Corresponding in part to the printed sources Computer and Control Abstracts and Electrical and Electronics Abstracts , the database covers a limited number of patents, selected for inclusion on the basis of their scientific and technical interest. A charge is made for the use of this service, ask at the Information and Enquiries Desk on Level 3 for further details.