NUMBER OF RECORDS
Number of records in Derwent World Patents Index
Derwent World Patents Index now covers more than 22.08 million inventions (Basic Records/patent families) detailed in 48.4 million patent documents.
Breakdown by subject area for 30 April 2012 (update 201227):
|
Chemical Section | ||
|
Section A |
Polymers and Plastics |
3,092,186 |
|
Section B |
Pharmaceuticals |
1,183,231 |
|
Section C |
Agricultural Chemicals |
308,631 |
|
Section D |
Food, Detergents, Water Treatment & Biotech. |
1,498,659 |
|
Section E |
General Chemicals |
1,058,172 |
|
Section F |
Textiles and Paper-Making |
620,034 |
|
Section G |
Printing, Coating and Photographic |
647,222 |
|
Section H |
Petroleum |
383,885 |
|
Section J |
Chemical Engineering |
753,972 |
|
Section K |
Nucleonics, Explosives and Protection |
152,240 |
|
Section L |
Refractories, Ceramics, Cement, Electro(in)org. |
1,640,120 |
|
Section M |
Metallurgy |
998,165 |
|
Engineering Section | ||
|
Section P |
General |
6,332,426 |
|
Section Q |
Mechanical |
5,389,652 |
|
Electronic & Electrical Sections | ||
|
Section S |
Instrumentation, Measuring and Testing |
2,301,745 |
|
Section T |
Computing and Control |
3,474,867 |
|
Section U |
Semiconductors and Electronic Circuitry |
2,440,831 |
|
Section V |
Electronic Components |
1,936,031 |
|
Section W |
Communications |
3,006,149 |
|
Section X |
Electric Power Engineering |
3,129,350 |
Please note:
These figures are all based on the number of unique basic patent records. Equivalent patent document filings are added to these records to form a Derwent patent family.
Individual records may appear in a number of different sections, so the above numbers can not be added together to give the total number of records in DWPISM.
Support Center
Visit our Support Center - packed with support, reference and training information to help you use our products effectively.
Latest DWPI News
Visit the DWPI News Archive for more about DWPI developments.