| 1931 HAGUE Equipment Liquid Transporting Vessels |
| 1931 CHANDLER EQUIPMENT CO Load Bracing Art |
| 1931 ENTPR RAILWAY EQUIPMENT CO Load Discharging Car |
| 1931 CENTRAL MINE EQUIPMENT Blasting Cartridge Tamper |
| 1931 COLLECTION EQUIPMENT CORP Self Loading Vehicle |
| 1931 COLOMAN Catering Equipment Motor Cars Art |
| 1931 GEN MOTORS CORP Loading Equipment Patent |
| 1931 MCCUNE Safety Car Control Equipment Patent |
| 1931 PRESSNALL Rerailing Railroad Equipment Art |
| 1931 STURGES Boat Equipment Patent Print Art |
| 1931 VER Electric Train Control Equipment Art |
| 1931 WILLIAMS Loading Equipment Patent Print Art |
| 1931 BEAGLE Life Saving Equipment Patent Print |
| 1931 UNION RAILWAY EQUIPMENT COMPAN Hand Brake Wheel |
| 1931 KARL Electric Train Control Equipment Art |
| 1931 ILLINOIS RAILWAY EQUIPMENT CO Floor Rack Hinge |
| 1931 CENTRAL MINE EQUIPMENT Blasting Cartridge |
| 1931 WESTINGHOUSE Safety Car Control Equipment |
| 1931 STURGES PERLEY Boat Equipment Patent Print |
| 1931 TRAIN AUTOMATIC CONTROL EQUIPMENT locomotive book |
| 1931 BETTER AUTOMOTIVE EQUIPMENT CATALOGUE CATALOG |
| 1931 Snead Bookstacks Stackroom Equipment Book |
| 1931 Stoll Outing Equipment Catalog, Camp Camping Hunt |