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.