| 08.13.01 | Macaroni |
| 23.03.02 | Machine guns |
 | Machines |
| 15.03 | Household |
| 15.01 | Industrial or agricultural |
| 15.05 | Office/business |
| 08.07.02 | Magarine |
| 12.01.25 | Magazine racks |
| 20.05.03 | Magazines |
| 02.07.50 | Magicians |
| 14.03.25 | Magnets |
| 16.03.06 | Magnifying glasses |
| Mailboxes |
| 19.07.07 | Home |
| 19.05.09 | US |
| 10.05.09 | Make-up |
| 24.19.02 | Male symbols |
| 02.05.01 | Males (adult) |
| Mallets |
| 21.03.04 | Sport |
| 14.05.01 | Tool |
| 24.13.25 | Maltese crosses |
| 03.13 | Mammal body parts, skeleton, skull |
| 03.09 | Mammals (small) |
| 03.03.01 | Mammoths |
| 22.01.07 | Mandolins |
| 07.11.25 | Manhole covers |
| 02.11.10 | Mannequins |
| 12.01.25 | Mantles (fireplace) |
| 29.01.01 | Manufactured articles, miscellaneous |
| 20.03.24 | Manuscript paper and sheet music |
| 05.03.03 | Maple leaves |
| 05.01.02 | Maple trees |
| 01.17 | Maps |
| 01.17.05 | Africa |
| 01.17.02 | Asia |
| 01.17.06 | Australia |
| 01.17.25 | Cities, state parks, universities, etc |
| 01.17.01 | Europe |
| 01.17.13 | Isolated islands |
| 01.17.03 | North America |
| 01.17.09 | Other countries |
| 01.17.04 | South America |
| 01.17.08 | United States |
| 01.17.11 | US states |
| 01.17.14 | World maps |
| 06.03.25 | Marinas |
| 21.01.10 | Marionettes and puppets |
| 20.01.01 | Markers (writers' material) |
| 08.03.25 | Marshmallows |
| 10.05.09 | Mascara |
| 20.01.25 | Masking tape (rolls) |
| Masks |
| 21.03.25 | Catchers' |
| 21.03.25 | Fencing |
| 04.09.01 | Halloween |
| 21.03.25 | Scuba |
| 09.03.25 | Surgical |
| 04.09.01 | Theatrical |
| 10.01.07 | Matches |
| 24.19 | Mathematical signs and symbols |
| Mats |
| 09.01.12 | Bath |
| 09.01.12 | Door |
| 09.01.12 | Exercise |
| 09.01.05 | Table placemats |
| 12.01.02 | Mattresses |
| 20.03.08 | Mazes |
| 11.01.25 | Measuring cups |
| 17.07 | Measuring instruments |
| Meat choppers and grinders |
| 11.05.02 | Electric grinders |
| 11.07.03 | Meat choppers (knives) |
| 11.01.08 | Non-electric grinders |
| 08.11 | Meat |
| 15.01 | Mechanical appliances for industry |
| 24.07 | Medals |
| 10.07 | Medical articles and devices |
| 12.01.10 | Medicine cabinets |
| 10.09 | Medicines |
| 16.01.25 | Megaphones |
| 05.09.10 | Melons |
| 02.01.01 | Men |
| 02.05.01 | Groups of |
| 20.03.24 | Menus |
| 04.03.03 | Mermaids |
| 21.03.14 | Merry-go-rounds |
| 17.07.25 | Metal detectors (hand-held) |
| 01.09.25 | Meteors |
| 07.11.25 | Meters, parking |
| 22.01.14 | Metronomes |
| 02.07.14 | Mexicans |
| 03.09.06 | Mice |
| 17.07.08 | Micrometers |
| 03.23.15 | Micro-organisms |
| 16.01.07 | Microphones |
| 16.03.05 | Microscopes |
| 13.03.02 | Microwave ovens |
| 09.05.25 | Military helmets |
| 11.03.04 | Milk bottles and cartons |
| 11.03.05 | Milk cans |
| 11.01.10 | Mills (pepper/coffee) |
| 07.03.05 | Mills(water/wind) |
| 02.07.41 | Mimes |
| 07.03.03 | Minarets |
| 02.07.44 | Miners |
| 03.09.05 | Minks |
| 04.03.01 | Minotaurs |
| 24.19.07 | Minus symbols |
| Mirrors |
| 10.07.25 | Dental |
| 10.05.12 | Hand-held |
| 18.11.25 | Vehicle |
| 12.01.11 | Wall-mounted or free standing |
| 29 | Miscellaneous designs |
| 18.09.02 | Missiles and rockets |
| 24.03.02 | Mitres (Bishops' hats) |
| 09.03.12 | Mittens |
| 21.03.06 | Mitts (baseball) |
| Mixers |
| 18.05.09 | Cement |
| 11.05.04 | Food (electric) |
| 11.01.11 | Food (non-electric) |
| 18.05.07 | Mobile homes |
| 09.07.04 | Moccasins |
| 01.13.02 | Molecular models |
| 03.09.06 | Moles |
| 03.19.12 | Mollusks |
| 24.19 | Monetary symbols |
| 19.07.13 | Money bags |
| 03.11.01 | Monkeys |
| 02.07.40 | Monks |
| 07.09 | Monuments |
| 01.11 | Moons |
| 01.11.02 | Cresent |
| 01.11.01 | Full |
| 01.11.02 | Half |
| 07.11.10 | Mooring posts |
| 03.07.07 | Moose |
| 18.05.02 | Mopeds |
| 11.09.04 | Mops |
| 09.05.25 | Mortarboards (headwear) |
| 11.09.04 | Tool |
| 14.05.10 | Mortars (for plaster) |
| 19.13.01 | Mortars and pestles |
| 07.03.03 | Mosques |
| 03.23.09 | Mosquitos |
| 05.13.02 | Mosses |
| 07.03.07 | Motels |
| 03.23.01 | Moths |
| 18.05.07 | Motor homes |
| 18.05.02 | Motorcycles and motor scooters |
| 15.01.04 | Motors (machinery) |
| 15.01.04 | Motors, outboard (boat) |
| 02.07.28 | Mountaineers |
| 06.01.04 | Mountains |
| 11.09.05 | Mouse traps |
| 02.11.07 | Moustaches |
| 16.03.01 | Movie cameras |
| Mowers, lawn |
| 15.01.08 | Manual |
| 15.01.08 | Power |
| 18.05.06 | Riding |
| 11.03.14 | Muffin pans |
| 08.01.25 | Muffins |
| 18.11.03 | Mufflers and exhaust systems |
| Mugs |
| 11.03.02 | Beer |
| 11.03.03 | Coffee |
| 03.05.02 | Mules |
| 24.19.08 | Multiplication symbols |
| 05.11.07 | Mushrooms |
| 20.03.24 | Music, sheet |
| 22.01.25 | Music stands |
| 22.01 | Musical instruments |
| 24.19.13 | Musical symbols |
| 23.03.02 | Muskets |
| 11.03.11 | Mustard pots |
| 22.01.25 | Mutes (musical instruments) |
| 04.03 | Mythological beings part human and part animal |
| 04.05 | Mythological or legendary animals |
| 02.07.86 | Mythological personages |
