| 1931 UNION Means Holding Covers In Place Art |
| 1931 BROWN Gate Operating Means Patent Print Art |
| 1931 RUPPERT Rail Locking Means Patent Print Art |
| 1931 CROSBY Propelling Means Boats Like Art |
| 1931 LYDA Davit Operating Means Art Print |
| 1931 SPERRY Means Preventing Pitching Ships Art |
| 1931 HEENE GEORGE Marking Means Patent Print Art |
| 1931 LEO Means Shipping Automobile Bodies Art |
| 1931 EUCLID CRANE HOIST Drawbar Means Art Print |
| 1931 ASEA AB Means Suppressing Vibrations Art |
| 1931 STEVENS Means Locating Sunken Vessels Art |
| 1931 PERIN DONALD Locking Means Patent Print Art |
| 1931 ARLE Means Suppressing Vibrations Art Print |
| 1931 KENT Sound Recording Reproducing Means Art |
| 1931 BERGEN Means Handling Freight Express Art |
| 1931 SPIRO Packing Box Attaching Means Art Print |
| 1931 NAPIER Toy Securing Means Patent Print Art |
| 1931 ELECTRIC Door Holding Means Release Art |
| 1931 TURNER Method Means Watch Regulation Art |
| 1931 MICHAEL Means Extracting Air From Water Art |
| 1931 CLAUSEN Means Holding Covers In Place Art |
| 1931 GAY Method Means Propelling Ships Art Print |
| 1931 MOEHLER OTTO Support Means Patent Print Art |
| 1931 SERSEN Means Acoustical Correction Art |