| 01.15.25 | Coal |
| 11.03.25 | Coasters, beverage |
| 06.03.01 | Coastlines |
| 11.09.02 | Coat hangers |
| 09.03.01 | Coats |
| 03.23.14 | Cockroaches |
| 05.07.03 | Cocoa beans |
| 03.23.03 | Cocoons |
| 05.07.03 | Coffee beans |
| 11.03.03 | Cups and mugs |
| | Grinders |
| 11.05.05 | Electric |
| 11.01.10 | Non-electric |
| 11.01.25 | Measurers |
| 11.01.10 | Mills |
| 11.05.06 | Percolators |
 | Pots |
| 11.05.06 | Electric |
| 11.03.12 | Non-electric |
| 12.01.07 | Tables |
| 19.05.07 | Coffins |
| 15.07.01 | Cog wheels |
| 24.07 | Coins |
| 11.01.06 | Colanders |
| 08.11.04 | Coldcuts (meat) |
| 18.13.05 | Collars (animal equipment) |
| 02.07.25 | Colonials (human) |
| 07.09.03 | Columns (building) |
| 14.11.08 | Combination locks |
| 18.05.08 | Combines |
| 10.05.05 | Combs, hair |
| 01.01.03 | Comets |
| 09.01.07 | Comforters, bed |
| 24.19.14 | Commas |
| 16.01.05 | Compact discs |
| | Compactors |
| 15.03.25 | Electric household |
| 15.01.25 | Industrial and commercial |
| 10.05.12 | Compacts, make-up |
| 01.01.06 | Compass points and compass cards |
| Compasses |
| 17.07.05 | Directional |
| 17.07.04 | Drafting |
| 15.05.04 | Computer devices |
| 15.05.04 | Chips |
| 16.01.06 | Game cartridges |
| 15.05.02 | Keyboards |
| 15.0503 | Terminals |
| 22.0125 | Conductors' wands, batons |
| 26.1703 | Cones (geometric) |
| 08.09 | Confections, frozen |
| 12.01.07 | Conference tables |
| 14.03.04 | Connectors (clamps, collars) |
| 01.03 | Constellations |
| 15.01 | Construction machines |
| 18.05 | Vehicles |
| 16.03.07 | Contact lenses |
| Containers |
| 11.03 | Beverage |
| 19.13 | For laboratory use |
| 19.05 | Large |
| 19.07 | Small |
| 01.17 | Continents, maps of |
| 15.01.03 | Conveyor belts |
| 20.05.01 | Cook books |
| 11.03 | Cook ware (non-electric) |
| 11.03.13 | Cookers, pressure |
| 11.03.25 | Cookie sheets |
| 08.01.05 | Cookies |
| 13.03 | Cooking equipment |
| 13.03.02 | Ranges, electric or gas |
| 17.01.25 | Timers |
| Coolers |
| 19.07.25 | Portable beverage |
| 13.03.25 | Water |
| 13.03 | Cooling equipment |
| 03.19.13 | Coral formations |
| 06.03.02 | Reefs |
| 19.11.01 | Corks (bottle stoppers) |
| 11.01.07 | Corkscrews |
| Corn |
| 05.11.08 | Ears, not in the husk |
| 05.07.25 | Kernels |
| 05.07.01 | Stalks, ears in the husk |
| Corn poppers |
| 13.03.05 | Electric |
| 11.03.25 | Non-electric |
| 19.07.24 | Cornucopias |
| 07.15.03 | Corrugated material |
| 09.03.10 | Corsets |
| 10.05 | Cosmetics |
| 12.01.01 | Cots |
| 10.05.25 | Cotton balls |
| 10.05.25 | Swabs |
| 12.01.05 | Couches |
| 12.01.08 | Counters, store |
| 01.17 | Countries, maps of |
| 14.01.01 | Couplings and joints, metal pipe |
| 20.03.24 | Coupons |
| 06.09.08 | Courts, athletic |
| 09.03.02 | Coveralls |
| 09.07.01 | Cowboy boots |
| 09.05.05 | Cowboy hats |
| 02.07.26 | Cowboys and Cowgirls |
| 03.07.01 | Cows |
| 03.01.09 | Coyotes |
| 03.19.08 | Crabs |
| 08.01.06 | Crackers |
| 12.01.03 | Cradles, infant |
| 14.01.25 | Crane hooks |
| 18.05.09 | Cranes, hoisting |
| 19.05.05 | Crates |
| 03.19.10 | Crayfish |
| 20.01.01 | Crayons |
| Cream |
| 11.03.04 | Carton of |
| 08.07.01 | Whipped |
| 20.03.05 | Credit cards |
| 08.01.11 | Crepes |
| 01.11.02 | Cresent Moons |
| 24.01 | Crests |
| 12.01.03 | Cribs |
| 21.03.03 | Cricket bats |
| 03.23.10 | Crickets |
| 09.09.01 | Crochet hooks |
| 03.21.05 | Crocodiles |
| 08.01.04 | Croissants |
| 21.03.04 | Croquet mallets |
| 16.03.25 | Cross hairs |
| 23.01.03 | Crossbows |
| 24.13 | Crosses |
| 21.01.05 | Crossword puzzles |
| 02.05.06 | Crowds |
| 24.11 | Crowns |
| 05.15.01 | Crowns of leaves, flowers or fruit |
| 03.15.11 | Crows |
| 11.03.11 | Cruets |
| 10.07.02 | Crutches |
| 26.17.04 | Cubes (geometric) |
| 08.09.05 | Cubes, ice |
| 05.11.06 | Cucumbers |
| 21.03.25 | Cues, billiard |
| 17.03.25 | Cuff links |
| 06.09 | Cultivated areas |
| 08.01.08 | Cupcakes |
| 02.07.71 | Cupids |
| Cups |
| 11.03.02 | Beer mugs |
| 11.03.03 | Coffee mugs |
| 11.01.25 | Measuring |
| 11.03.01 | Styrofoam� |
| 24.07.10 | Trophy |
| 10.05.08 | Curlers |
| 10.05.08 | Curling irons |
| 20.03.24 | Currency |
| 09.01.10 | Curtains |
| 09.01.07 | Cushions |
| 08.13.05 | Custards, puddings |
| 11.07 | Cutlery |
| 11.01.09 | Cutting or carving boards |
| 26.17.02 | Cylinders (geometric) |
| 22.01.04 | Cymbals |
