NUMBER OF RECORDS
Numbers of records in Derwent World Patents Index
Derwent World Patents Index now covers more than 18 million inventions (Basic Records/patent families) detailed in over 38.9 million patent documents.
Breakdown by subject area for 19 June 2009 (update 200939):
|
Chemical Section | ||
|
Section A |
Polymers and Plastics |
2,480,083 |
|
Section B |
Pharmaceuticals |
969,333 |
|
Section C |
Agricultural Chemicals |
268,666 |
|
Section D |
Food, Detergents, Water Treatment & Biotech. |
1,220,609 |
|
Section E |
General Chemicals |
951,001 |
|
Section F |
Textiles and Paper-Making |
539,221 |
|
Section G |
Printing, Coating and Photographic |
589,085 |
|
Section H |
Petroleum |
327,561 |
|
Section J |
Chemical Engineering |
632,949 |
|
Section K |
Nucleonics, Explosives and Protection |
141,329 |
|
Section L |
Refractories, Ceramics, Cement, Electro(in)org. |
1,428,262 |
|
Section M |
Metallurgy |
891,389 |
|
Engineering Section | ||
|
Section P |
General |
5,106,682 |
|
Section Q |
Mechanical |
4,356,233 |
|
Electronic & Electrical Sections | ||
|
Section S |
Instrumentation, Measuring and Testing |
1,839,158 |
|
Section T |
Computing and Control |
2,684,705 |
|
Section U |
Semiconductors and Electronic Circuitry |
2,028,415 |
|
Section V |
Electronic Components |
1,588,453 |
|
Section W |
Communications |
2,450,047 |
|
Section X |
Electric Power Engineering |
2,394,697 |
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.
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