| 1931 PAUL Clock Frame Method Making Same Art |
| 1931 MILLMAN Method For Making Bust Supporters |
| 1931 LAUTER HUMANO CO Piano Case Method Making Same |
| 1931 KALBACH Machine Making Rugs Coverings Like |
| 1931 POVALSKI Identification Plate Method Making Same |
| 1931 CURTIN Noise Making Toy Patent Print Art |
| 1931 COOPER TEA PACKET Bag Making Machine Art |
| 1931 WILLIAM Rug Method Making Same Art Print |
| 1931 DELTOX RUG Rug Method Making Same Art |
| 1931 UNITED Buttonhole Making Machine Art Print |
| 1931 CAMERON Piano Case Method Making Same Art |
| 1931 SIMON COOPER Bag Making Machine Patent |
| 1931 GUSTAV Cartridge Shell Method Making Same |
| 1931 RIVIERE Tufted Fabric Method Making Same |
| 1931 JOSEPH Machine Method Making Continuous Cushions |
| 1931 WENTWORTH Buttonhole Making Machine Patent |
| 1931 UNION Tufted Fabric Method Making Same Art |
| 1931 NAT Machine Method Making Continuous Cushions |
| 1931 ALLEN Metal Arrow Method Making Same Art |
| Vintage 1931 U.S.Bureau of Standards For Making Mirrors |
| 1931 The Making of Man - editor:Calverton- Anthropology |