Patent applications to the EPO by priority year by international patent classification (IPC) sections and classes (1977-2012)
methods, notes and classification
0d Furniture; domestic articles or appliances; coffee mills; spice mills; suction cleaners in general
0e Medical or veterinary science; hygiene
0f Life-saving; fire-fighting
0g Sports; games; amusements
0h Section B - Performing operations; transporting
0i Physical or chemical processes or apparatus in general
0j Crushing, pulverising, or disintegrating; preparatory treatment of grain for milling
0k Separation of solid materials using liquids or using pneumatic tables or jigs; magnetic or electrostatic separation of solid materials from solid materials or fluids; separation by high-voltage electric fields
0l Centrifugal apparatus or machines for carrying-out physical or chemical processes
0m Spraying or atomising in general; applying liquids or other fluent materials to surfaces, in general
0n Generating or transmitting mechanical vibrations in general
0o Separating solids from solids; sorting
0p Cleaning
0q Disposal of solid waste; reclamation of contaminated soil
0r Mechanical metal-working without essentially removing material; punching metal
0s Casting; powder metallurgy
0t Machine tools; metal-working not otherwise provided for
0u Grinding; polishing
0v Hand tools; portable power-driven tools; handles for hand implements; workshop equipment; manipulators
0w Hand cutting tools; cutting; severing
0x Working or preserving wood or similar material; nailing or stapling machines in general
0y Working cement, clay, or stone
0z Working of plastics; working of substances in a plastic state in general
10 Presses
11 Making paper articles; working paper
12 Layered products
13 Printing; lining machines; typewriters; stamps
14 Bookbinding; albums; files; special printed matter
15 Writing or drawing implements; bureau accessories
16 Decorative arts
17 Vehicles in general
18 Railways
19 Land vehicles for travelling otherwise than on rails
1a Ships or other waterborne vessels; related equipment
1b Aircraft; aviation; cosmonautics
1c Conveying; packing; storing; handling thin or filamentary material
1d Hoisting; lifting; hauling
1e Opening or closing bottles, jars or similar containers; liquid handling
1f Saddlery; upholstery
1g Micro-structural technology
1h Nanotechnology
1i Section C - Chemistry; metallurgy
1j Inorganic chemistry
1k Treatment of water, waste water, sewage, or sludge
1y Metallurgy; ferrous or non-ferrous alloys; treatment of alloys or non-ferrous metals
1z Coating metallic material; coating material with metallic material; chemical surface treatment; diffusion treatment of metallic material; coating by vacuum evaporation, by sputtering, by ion implantation or by chemical vapour deposition, in general; inhibiting corrosion of metallic material or incrustation in general
20 Electrolytic or electrophoretic processes; apparatus therefor
21 Crystal growth
22 Combinatorial technology
23 Section C Other - Chemistry; metallurgy
24 Section D - Textiles; paper
25 Natural or artificial threads or fibres; spinning
26 Yarns; mechanical finishing of yarns or ropes; warping or beaming
2j Doors, windows, shutters, or roller blinds, in general; ladders
2k Earth or rock drilling; mining
2l Section F - Mechanical engineering; lighting; heating; weapons; blasting
2m Machines or engines in general; engine plants in general; steam engines
2n Combustion engines; hot-gas or combustion-product engine plants
2o Machines or engines for liquids; wind, spring, or weight motors; producing mechanical power or a reactive propulsive thrust, not otherwise provided for
2p Positive-displacement machines for liquids; pumps for liquids or elastic fluids
2q Fluid-pressure actuators; hydraulics or pneumatics in general
2r Engineering elements or units; general measures for producing and maintaining effective functioning of machines or installations; thermal insulation in general
2s Storing or distributing gases or liquids
2t Lighting
2u Steam generation
2v Combustion apparatus; combustion processes
2w Heating; ranges; ventilating
2x Refrigeration or cooling; combined heating and refrigeration systems; heat pump systems; manufacture or storage of ice; liquefaction or solidification of gases
2y Drying
2z Furnaces; kilns; ovens; retorts
30 Heat exchange in general
31 Weapons
32 Ammunition; blasting
33 Section G - Physics
34 Measuring; testing
35 Optics
36 Photography; cinematography; analogous techniques using waves other than optical waves; electrography; holography
Patent applications to the EPO by priority year by international patent classification (IPC) sections and classes (1977-2012)
methods, notes and classification
Methods 
Variables