| Company | City | WMI | |
|---|---|---|---|
| M Manufacturing, Inc. | Youngstown OH | 1M9-381 | |
| M&G Tankers Limited | Mississauga ON | SA9-020 | |
| M&J Trailers Unlimited, Inc. | Elma IA | 4MG | |
| M&L Racing Enterprises | Brunswick GA | 1M9-020 | |
| M&M Development Ltd. | Langley BC | 2M9-147 | |
| M&M Fabricators Corporation | Elkhart IN | 1M9-246 | |
| M&M Manufacturing | Benton MO Lumberton TX | 1M9-215 1M9-418 | |
| M&R Trailers Manufacturing | Kodak TN | 1M9-253 | |
| M&S Trailers | Sioux Falls SD | 1M9-332 | |
| M&T Research & Development | Central Point OR | 1M9-427 | |
| M.H. Eby, Inc. | Blue Ball PA | 4A2 | |
| M.J. Taylor Manufacturing Co. | Greene NY | 1M9-004 | |
| Mac Stripers Inc. | Montgomery AL | 1M9-376 | |
| Mac Trailer Manufacturing Inc. | Alliance OH Alliance OH | 1M9-096 5MA | |
| Mac's Custom Trailers | Movis NY | 1M9-306 | |
| Mac-Lander, Inc. | Osceola IA Osceola IA | 1M9-217 4UV | |
| Mackey Trailer | Tempe AZ | 1M9-336 | |
| Mackey Trailers | Mesa AZ Tempe AZ | 1M9-360 A1M | |
| Macklin Welding | Veradale WA | 1M9-023 | |
| Macks Metal Fab | Spartanburg SC | 1M9-176 | |
| Magic Tilt Trailer Manufacturing | Clearwater FL | 1M5 | |
| Magna Tech | Chanute KS | 1M9-318 | |
| Magnabus SA de CV | Riverside CA | 3M9-001 | |
| Magnetek Century Electric | Adamsville TN | 1M9-412 | |
| Magnolia Trailers, Inc. | Lucedale MS | 1M9-435 | |
| Magnum Products, Inc. | Berlin WI | 5AJ | |
| Magnum Trailer & Equipment Inc. | Abbotsford BC | 2P9-015 | |
| Magnum Trailer Mfg. Inc. | Phoenix AZ | 1M9-450 | |
| Maibo Pruning System | Kingsport TN | 1M9-327 | |
| Maine Hitch & Trailer Sales | Dresden ME | 1M9-469 | |
| Mainline, Inc. | North Tazewell VA | 1M9-532 | |
| Maisons SRM Blondeau Homes, Inc. | Saint-Ferdinand QU | 2M9-135 | |
| Mallard Coach Company, Inc. | Nappanee IN | 1U8 | |
| Manac | Saint-Georges QU | 2M5 | |
| Mann Made Products Inc. | Waterville KS | 1M9-482 | |
| Manorette RV, Inc. | Chilton WI | 1M9-255 | |
| Manteca Trailer & Camper | Manteca CA | 1UJ | |
| Manufacturers Resources Int'l | Citrus Heights CA | 1M9-390 | |
| Marathon Equipment Company | Clearfield PA | 1M9-371 | |
| Marauder Travelers, Inc. | Wakarusa IN | 1M7 | |
| Marci's Diesel Service, Inc. | Stockton CA | 1M9-398 | |
| Marion Fabtech, Inc. | Marion AL | 1F9-129 | |
| Mark Body Truck & Equipment Inc. | Imlay City MI | 1M9-406 | |
| Mark IV Enterprises, Inc. | Indianapolis IN | 1M9-350 | |
| Mark Line Industries of Pennsylvania, Inc. | Bristol IN | 4BP | |
| Mark's Trailers, Inc. | Jefferson TX | 1YA | |
| Mark's Welding | 1M9-261 | ||
| Marley Continental Homes of Kansas | Osage City KS | 1M9-231 | |
| Marlin Boats | White City OR | 427 | |
| Marlin Trailers | Marlin WA | 1M9-292 | |
| Marquardt Trailer Mfg., Inc. | Venango NE | 1M9-529 | |
| Marsh Industrial Services, Inc. | Kalkaska MI | 1M9-382 | |
| Marshall Austin Productions, Inc. | Lakewood CO | 1M9-542 | |
| Marshall Trailer Sales | Marshall TX | 4FX | |
| Marshall Welding, Inc. | Marshall MO | 1M9-378 | |
| Martin Enterprises | Gravette AR | 1M9-436 | |
| Martin Machine | Lee's Summit MO | 1M9-206 | |
| Martin RV Corporation | Elkhart IN | 1M9-517 | |
| Martinez & Turek Inc. | Rialto CA Rialto CA | 1M9-234 1M9-565 | |
| Martinez Welding, Inc. | Plaquemine LA | 1M9-481 | |
| Marvel Trailer Manufacturing | Salem OR | 1M9-316 | |
| Maryland Trailer Sales/MTS Mfg. | Baltimore MD | 1M9-512 | |
| Massie Manufacturing, Inc. | Baraba MI | 1M9-282 | |
| Masson's Welding | Dracut MA | 1M9-441 | |
| Master Tow Inc. | Fayetteville NC | 4DF | |
| Master Trailers | Burleson TX | 41T | |
| Mastercraft Boat Company | Maryville TN Vonore TN | 19M | |
| Material Transfer | Ionia IA | 1N9-059 | |
| Mathews Mechanical Contractors | Elizabethtown PA | 49Y | |
| Mattox Trailers | Marksville LA | 1M9-447 | |
| Matty's Marine & Motorsports, Inc. | West Brownsville PA | 1M9-552 | |
| Maurer Manufacturing Inc. | Spencer IA | 1M9-152 | |
| Maverick Marine, Inc. | Colton CA | 17L | |
| Max-Atlas | Saint-Jean-sur-Richelieu QU | 2V9- | |
| Maxey Trailers | Honey Grove TX | 1M9-525 | |
| Maximon Machine | Altoona PA | 1C9-292 | |
| May Mfg. Distribution Corp. | Arvada CO | 1M9-099 | |
| May Trailer Manufacturing, LLC | Ada OK | 4CB | |
| MB Companies, Inc. of Wisconsin | Chilton WI New Holstein WI | 1M9-349 | |
| McBride Trailers Inc. | Barrie ON | 2M9- | |
| McCaron Steel Fabrications Inc. | Baldwin Park CA | 1M9-254 | |
| McClain Industries, Inc. | Utica MI Utica MI Detroit MI Galion OH | 1M9-091 1M9-130 1M9-309 | |
| McClain Trailers Inc. | Houston TX | 4LY | |
| McClintock Metal Fabricators, Inc. | Woodland CA | 4MF | |
| McCord Manufacturing Inc. | Kentland IN | 1M9-119 | |
| McCormick Machine, LLC | Fulton MO | 1M9-502 | |
| McCoy Manufacturing Company | Los Angeles CA | 1MS | |
| McCullough Trailer Corporation | West Brookfield MO | 41B | |
| McElrath Trailers Welding Inc. | Inman SC | 1M9-284 | |
| McKechnie Corporation | Lake City PA | 1M9-239 | |
| McLellan Equipment, Inc. | Hanford CA | 1M9-484 | |
| MCT Industries, Inc. | Albuerque NM | 15C | |
| Mechanismos Ensamblados | Colonial Lagranges MX | 3A9-004 | |
| Medford Trailer Company | Central Point OR | 1M9-341 | |
| Medic Equipment Company, Inc. | Houston TX | 1M9-248 | |
| Meeks Engineering | Greensboro NC | 1M9-465 | |
| Meeks Truck & Trailer | Attalla AL | 1M9-474 | |
| Mega Manufacturing, Inc. | Hutchinson KS | 1M9-401 | |
| Melissa Manufacturing | Van Nuys CA | 1M9-384 | |
| Melvin Chastain | Apple Valley CA | 1V9-084 | |
| Merhow Industries | Bristol IN | 1M9-031 | |
| Merritt Equipment Company | Henderson CO | 1MT | |
| Mertz, Inc. | Ponca City OK Ponca City OK | 1M9-195 1M9-211 | |
| Mesco Inc. | Blue Spring MI | 1A9-334 | |
| Metal Fab | Ramona CA | 1M9-069 | |
| Metal Fabrication, Inc. | Winchester TN | 4J2 | |
| Metal Works | Greenville KY | 1M9-159 | |
| Metro Tank & Steel, Inc. | Gainsville TX | 1M9-560 | |
| Metro Trailer Manufacturing Inc. | Romulus MI | 1M9-375 | |
| Metzger Machine & Engineering Co. | Milwaukee WI | 1M6 | |
| MGS Inc. | Denver PA | 16M | |
| MHC Group, Inc., the | Rancho Cucamong CA | 1T9-651 | |
| Mi Joy Manufacturing, Inc. | Lake Havasu City AZ | 1M9-395 | |
| Miano's Welding | Butler PA | 1M9-081 | |
| Michael Manufacturing Inc. | Anton CO | 1M9-380 | |
| Michael Seltzer Welding | Orwigsburg PA | 1M9-518 | |
| Michelle S. Zavala | Cashion AZ | 1L9-175 | |
| Mid America Truck Equipment, Inc. | Belleville KS | 1M9-270 | |
| Mid-Atlantic Leasing Corporation | Chesapeake VA | 1M9-167 | |
| Mid-Nebraska Truck & Trailer | Grand Island NE | 1M9-308 | |
| Mid-South Trailers, Inc. | Byron GA | 1M9-463 | |
| Mid-States Int'l Motorcross Inc. | Lorain OH | 1M9-090 | |
| Midland Manufacturing Ltd. | Rosenort MB | 2M9-018 | |
| Midwest Tack & Trailer | 1M9-385 | ||
| Midwest Trailers of Sikeston, Inc. | Sikeston MO | 42N | |
| Midwest Welding Company | Sioux Falls SD | 1M9-305 | |
| Mighty Mite | Portland OR | 1M9-538 | |
| Mightymover Trailers, Inc. | Corona CA | 4AG | |
| Mike Green Hydros Inc. | Denton TX | 1M9-100 | |
| Mike Olsefski's Auto Accessories | Brooktondale NY | 1O9-135 | |
| Mike's Custom Cars | Rock Hill SC | 1M9-416 | |
| Mike's Trailer Manufacturing | Oklahoma City OK | 4MT | |
| Mike's Trailers | Shreveport LA | 1M9-093 | |
| Miles Transport Services Inc. | Tacoma WA | 1M9-086 | |
| Millennium Manufactruing | Cedar Bluff VA | 1M9-546 | |
| Millennium Trailers, Inc. | Addison AL | 5MT | |
| Miller Industries, Inc. | Ooltewah TN | 1M9-486 | |
| Miller Trailer & Manufacturer Co. | Miller MO | 1M9-537 | |
| Miller Trailer Parts, Inc. | Waukesha WI | 1M9-244 | |
| Miller Trailers, Inc. | Brandenton FL Mansfield TX | 1ML | |
| Millerbilt Trailers | Santa Fe Springs CA | 1M9-125 | |
| Millerbilt Trailers & Sales | Santa Fe Springs CA | 1M9-250 | |
| Miner Manufacturing Company | Donnellson IA | 1M9-506 | |
| Mini Kamp | Woodinville WA | 1M9-322 | |
| Mini-Ark, Inc. | Little Rock AR | 1M9-275 | |
| Minimixx Concrete Systems | Sacramento CA | 1M9-359 | |
| Minnesota Valley Engineering | New Prague MN | 1M9-437 | |
| Missouri Tank & Pressure Vessel | Kansas City MO | 1M9-508 | |
| Mister Air Sweepers | San Jose CA | 1M9-263 | |
| Mister Trailer Company | Sequim WA | 1M9-247 | |
| Misty Meadow Trailer Sales | Bridport VT | 1M9-487 | |
| Mitchell Industries, Inc. | Freeport FL | 12U | |
| Mity Mite Manufacturing | Phoenix AZ | 1M9-458 | |
| MJT Enterprises | Cleburne TX | 4GK | |
| Mobile International | Tulsa OK | 1M9-356 | |
| Mobile Manufacturing Company | Troutdale OR | 1M9-469 | |
| Mobile Medical Innovations Inc. | Greenville PA | 1M9-650 | |
| Mobile Products Inc. | Medina OH | 1M9-262 | |
| Mobile Systems, LLC | Mount Juliet TN | 1M9-543 | |
| Mobile Technical Systems, Inc. | Las Cruces NM | 1M9-545 | |
| Mobile Traffic Zone, Inc. | Woodland CA | 1M9-325 | |
| Mobile Trailers, Inc. | Mableton GA | 1M9-553 | |
| Mobile Traveler, Inc. | Junction City KS | 4OM | |
| Mobilift Inc. | Calgary AB | 2M9-131 | |
| Modec Inc. | Denver CO | 1M9-008 | |
| Modern Enterprises, Inc. | Rayville LA | 1M9-405 | |
| Modern, Inc. | Beaumont TX | 1UN | |
| Modulaire | Visalia CA | 1M9-295 | |
| Modular Structures Int'l, Inc. | Riverside CA | 1M9-AAA | |
| Moen Custom Trailers | Ventura CA | 1M9-411 | |
| Molt-N-Metal Inc. | Reno NV | 1M9-310 | |
| Monaco Coach Corporation | Wakarusa IN Coburg OR | 1KB 4K0 | |
| Monarch Trailer Company | Mansfield OH | 1M9-294 | |
| Monarch-McLaren | Elkhorn WI | 43M | |
| Monon Trailer | Monon IN | 1NN | |
| Monroe Manufacturing | Gresham OR | 1M9-391 | |
| Monroe Truck Equipment | Monroe WI | 1M9-067 | |
| Monteray Trailer Sales | Lone Grove OK | 1M9-407 | |
| Montone Trailer Company | Dillon SC | 1M9-003 | |
| Moody Manufacturing Company | Maben MS | 1MM | |
| Moog USA Inc. | Bedford VA | 1M9-092 | |
| Moon Docker Trailers | Searcy AR | 1M9-428 | |
| Moore Enterprises | Lake Havasu City AZ | 1M9-387 | |
| Moore Equipment Inc. | Carthage MS | 1M9-009 | |
| Moore Marine Marketing, Inc. | McQueeney TX | 1M9-144 | |
| Morbark Sales Corporation | Winn MI Winn MI | 1M9-457 4S8 | |
| Morgan Built Inc. | Roseburg OR Roseburg OR Roseburg OR | 1B9-811 1B9-813 1B9-814 | |
| Morgan Industries, Inc. | Morgan MN | 1M9-201 | |
| Morgan Machine Company | Fulton MO | 1M9-504 | |
| Moritz Inc. | Mansfield OH | 49M | |
| Moritz International Inc. | Mansfield OH | 4WX | |
| Moroney Body Works, Inc. | Worcester MA | 1M9-413 | |
| Morris Farms | Lockwood MO | 4VR | |
| Morris Trailers | Fort Stockton TX | 1M9-403 | |
| Morrison Manufacturing Inc. | Thibodaux LA | 1M9-068 | |
| Morrow Mobiles 2, Inc. | National City CA | 1M9-420 | |
| Morrow Mobiles, Inc. | San Diego CA | ||
| Morse Brothers, Inc. | Albany OR | 1M9-237 | |
| Motion Trailers | Decatur IL | 1M9-348 | |
| Motor Vehicle Registration Service | Rialto CA | 1S9-017 | |
| Motorized Manufacturing Inc. | Medford OR | 1K9-082 | |
| Motorsport Trailers, Inc. | Morgantown PA | 1M9-559 | |
| Mott's Custom Trailers | North Orange MA | 1M9-007 | |
| Mountail Lion Outdoor Inc. | Walker MN | 1M9-028 | |
| Mountain Ridge Trailers | Sevierville TN | 1M9-483 | |
| Mountain Trailer Company | Sussex NJ | 1M9-551 | |
| Mountainaire | Donnelly ID | 1M9-213 | |
| Moyock Manufacturing, Inc. | Moyock NC | 1M9-245 | |
| MP Trailer & Truck Bodies | Redding CA | 1M9-566 | |
| MPD Trailer Manufacturing, Inc. | Berlin NJ | 1M9-513 | |
| Mpire Industries Inc. | Maple Valley WA | 1M9-558 | |
| MSR Technologies | Indianapolis IN | 149-147 | |
| MT Trailers | Mountain Home AR | 1M9-477 | |
| MT Trailers, Inc. | Paris TX | 4MS | |
| Mudhens Manufacturing | Mifflinburg PA | 1M9-505 | |
| Mulligan Engineering, Inc. | Gibsonton FL | 1M9-461 | |
| Murill Engineering, Inc. | Montibello CA | 1M9-272 | |
| Murphy's Welding Services | Petal MN | 1M9-005 | |
| Murry Trailer Sales | Eugene OR | 1M9-226 | |
| Mustang Trailers | Glassport PA | 1M9-568 | |
| Mutiple Interests, Inc. | Chalmette LA | 1M9-216 | |
| Myco Trailers, Inc. | East Bradenton FL Bradenton FL | 1M9-349 4JF | |
| Myers & Sons Hi-Way Safety Inc. | Chino CA | 1M9-570 | |
| Mynatt Truck & Equipment Co. | Olathe KS | 1O9-342 |
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 1-9
 buses |
 cars |
 incomplete vehicles |
 low-speed vehicles |
 motor- cycles |
 multi- purpose vehicles |
 trailers |
 trucks |
 other vehicles |
