NUMBER OF RECORDS
Numbers of records in Derwent World Patents Index
Derwent World Patents Index now covers more than 18.86 million inventions (Basic Records/patent families) detailed in over 41.17 million patent documents.
Breakdown by subject area for 22 February 2010 (update 201013):
|
Chemical Section | ||
|
Section A |
Polymers and Plastics |
2,617,138 |
|
Section B |
Pharmaceuticals |
1,022,018 |
|
Section C |
Agricultural Chemicals |
277,493 |
|
Section D |
Food, Detergents, Water Treatment & Biotech. |
1,284,558 |
|
Section E |
General Chemicals |
979,177 |
|
Section F |
Textiles and Paper-Making |
556,885 |
|
Section G |
Printing, Coating and Photographic |
604,178 |
|
Section H |
Petroleum |
340,668 |
|
Section J |
Chemical Engineering |
659,289 |
|
Section K |
Nucleonics, Explosives and Protection |
143,455 |
|
Section L |
Refractories, Ceramics, Cement, Electro(in)org. |
1,483,745 |
|
Section M |
Metallurgy |
914,237 |
|
Engineering Section | ||
|
Section P |
General |
5,370,473 |
|
Section Q |
Mechanical |
4,571,658 |
|
Electronic & Electrical Sections | ||
|
Section S |
Instrumentation, Measuring and Testing |
1,936,824 |
|
Section T |
Computing and Control |
2,882,357 |
|
Section U |
Semiconductors and Electronic Circuitry |
2,134,002 |
|
Section V |
Electronic Components |
1,668,346 |
|
Section W |
Communications |
2,590,987 |
|
Section X |
Electric Power Engineering |
2,552,499 |
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.