NUMBER OF RECORDS
Numbers of records in Derwent World Patents Index
Derwent World Patents Index now covers more than 17.1 million inventions (Basic Records/patent families) detailed in over 37 million patent documents.
Breakdown by subject area for 04 November 2008 (update 200871):
|
Chemical Section | ||
|
Section A |
Polymers and Plastics |
2,324,477 |
|
Section B |
Pharmaceuticals |
909,337 |
|
Section C |
Agricultural Chemicals |
258,089 |
|
Section D |
Food, Detergents, Water Treatment & Biotech. |
1,154,693 |
|
Section E |
General Chemicals |
917,789 |
|
Section F |
Textiles and Paper-Making |
518,413 |
|
Section G |
Printing, Coating and Photographic |
570,889 |
|
Section H |
Petroleum |
314,152 |
|
Section J |
Chemical Engineering |
606,664 |
|
Section K |
Nucleonics, Explosives and Protection |
138,531 |
|
Section L |
Refractories, Ceramics, Cement, Electro(in)org. |
1,366,857 |
|
Section M |
Metallurgy |
870,438 |
|
Engineering Section | ||
|
Section P |
General |
4,863,794 |
|
Section Q |
Mechanical |
4,169,278 |
|
Electronic & Electrical Sections | ||
|
Section S |
Instrumentation, Measuring and Testing |
1,741,716 |
|
Section T |
Computing and Control |
2,486,055 |
|
Section U |
Semiconductors and Electronic Circuitry |
1,923,419 |
|
Section V |
Electronic Components |
1,503,948 |
|
Section W |
Communications |
2,303,486 |
|
Section X |
Electric Power Engineering |
2,244,205 |
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.