PlainPatent

Patent Technology Classes

Browse US patents by Cooperative Patent Classification (CPC) technology area, built from official USPTO data via PatentsView. See our methodology.

670 CPC subclasses · Page 10 of 14

Technology Subclasses · Page 10 (451–500 of 670)

Code Technology Area Class Patents
B65C Labelling OR Tagging Machines, Apparatus, OR Processes B65 1,055
A23D Edible Oils OR Fats, e.g. Margarines, Shortenings OR Cooking Oils A23 1,053
B31F Mechanical Working OR Deformation OF Paper, Cardboard OR Material Worked IN A Manner Analogous TO Paper B31 1,044
A43D Machines, Tools, Equipment OR Methods FOR Manufacturing OR Repairing Footwear A43 1,044
B25G Handles FOR Hand Implements B25 1,041
G04C Electromechanical Clocks OR Watches G04 1,040
C09G Polishing Compositions ; SKI Waxes C09 1,039
A21D Treatment OF Flour OR Dough FOR Baking, e.g. BY Addition OF MATERIALS; BAKING; Bakery Products A21 993
D05B Sewing D05 989
E01B Permanent WAY; Permanent-way TOOLS; Machines FOR Making Railways OF ALL Kinds E01 981
A41B SHIRTS; UNDERWEAR; Baby LINEN; Handkerchiefs A41 979
C01D Compounds OF Alkali Metals, i.e. Lithium, Sodium, Potassium, Rubidium, Caesium, OR Francium C01 976
E01H Street CLEANING; Cleaning OF Permanent WAYS; Cleaning BEACHES; Dispersing ; OR PREVENTING; FOG IN General ; Cleaning Street OR Railway Furniture OR Tunnel Walls E01 971
A23F COFFEE; TEA; Their SUBSTITUTES; Manufacture, Preparation, OR Infusion Thereof A23 971
E21D SHAFTS; TUNNELS; GALLERIES; Large Underground Chambers E21 962
B61B Railway SYSTEMS; Equipment Therefor NOT Otherwise Provided FOR B61 961
F42C Ammunition Fuzes ; Arming OR Safety Means Therefor F42 944
A23J Protein Compositions FOR FOODSTUFFS; Working-up Proteins FOR FOODSTUFFS; Phosphatide Compositions FOR Foodstuffs A23 927
F15D Fluid Dynamics, i.e. Methods OR Means FOR Influencing THE Flow OF Gases OR Liquids F15 924
F23L Supplying AIR OR Non-combustible Liquids OR Gases TO Combustion Apparatus IN General ; Valves OR Dampers Specially Adapted FOR Controlling AIR Supply OR Draught IN Combustion Apparatus ; Inducing Draught IN Combustion APPARATUS; Tops FOR Chimneys OR Ventilating SHAFTS; Terminals FOR Flues F23 922
F04F Pumping OF Fluid BY Direct Contact OF Another Fluid OR BY Using Inertia OF Fluid TO BE Pumped ; Siphons F04 906
D07B Ropes OR Cables IN General D07 899
F42D Blasting F42 887
B62L Brakes Specially Adapted FOR Cycles B62 885
A61D Veterinary Instruments, Implements, Tools, OR Methods A61 885
B04C Apparatus Using Free Vortex Flow, e.g. Cyclones B04 873
B61C LOCOMOTIVES; Motor Railcars B61 870
B23H Working OF Metal BY THE Action OF A High Concentration OF Electric Current ON A Workpiece Using AN Electrode Which Takes THE Place OF A TOOL; Such Working Combined With Other Forms OF Working OF Metal B23 839
G10D Stringed Musical INSTRUMENTS; Wind Musical INSTRUMENTS; Accordions OR CONCERTINAS; Percussion Musical INSTRUMENTS; Aeolian HARPS; Singing-flame Musical INSTRUMENTS; Musical Instruments NOT Otherwise Provided FOR G10 828
B21F Working OR Processing OF Metal Wire B21 817
F02G HOT GAS OR Combustion-product Positive-displacement Engine Plants ; USE OF Waste Heat OF Combustion ENGINES; NOT Otherwise Provided FOR F02 812
B61F Rail Vehicle Suspensions, e.g. Underframes, Bogies OR Arrangements OF Wheel AXLES; Rail Vehicles FOR USE ON Tracks OF Different WIDTH; Preventing Derailing OF Rail VEHICLES; Wheel Guards, Obstruction Removers OR THE Like FOR Rail Vehicles B61 797
B43K Implements FOR Writing OR Drawing B43 784
F16P Safety Devices IN GENERAL; ; Safety Devices FOR Presses F16 783
B41P Indexing Scheme Relating TO Printing, Lining Machines, Typewriters, AND TO Stamps B41 756
F23K Feeding Fuel TO Combustion Apparatus F23 754
F01B Machines OR Engines, IN General OR OF Positive-displacement Type, e.g. Steam Engines F01 754
C13K Saccharides Obtained From Natural Sources OR BY Hydrolysis OF Naturally Occurring Disaccharides, Oligosaccharides OR Polysaccharides C13 754
C25C Processes FOR THE Electrolytic Production, Recovery OR Refining OF METALS; Apparatus Therefor C25 753
C05C Nitrogenous Fertilisers C05 753
B27N Manufacture BY DRY Processes OF Articles, With OR Without Organic Binding Agents, Made From Particles OR Fibres Consisting OF Wood OR Other Lignocellulosic OR Like Organic Material B27 750
B31D Making Articles OF Paper, Cardboard OR Material Worked IN A Manner Analogous TO Paper, NOT Provided FOR IN Subclasses B31b OR B31c B31 747
G21D Nuclear Power Plant G21 744
B62H Cycle STANDS; Supports OR Holders FOR Parking OR Storing CYCLES; Appliances Preventing OR Indicating Unauthorized USE OR Theft OF CYCLES; Locks Integral With CYCLES; Devices FOR Learning TO Ride Cycles B62 738
C01C AMMONIA; CYANOGEN; Compounds Thereof C01 735
C21C Processing OF Pig-iron, e.g. Refining, Manufacture OF Wrought-iron OR STEEL; Treatment IN Molten State OF Ferrous Alloys C21 716
C21B Manufacture OF Iron OR Steel C21 713
B09C Reclamation OF Contaminated Soil B09 712
C05D Inorganic Fertilisers NOT Covered BY Subclasses C05b, C05C; Fertilisers Producing Carbon Dioxide C05 707
C23G Cleaning OR De-greasing OF Metallic Material BY Chemical Methods Other Than Electrolysis C23 703

CPC (Cooperative Patent Classification) data from USPTO PatentsView. Patents granted 2015–2025.