| 1940 NICHOLS WALTER Sewing Machine Patent Print |
| 1940 WALTER Chronometric Mechanism Patent Print |
| 1940 WALTER Water Or Aquatic Game Like Patent |
| 1940 WALTER Tank Arrangement For Aircraft Patent |
| 1940 WALTER Aircraft Supporting Wing Patent |
| 1940 HOHN WALTER Game Patent Print Art |
| 1940 WALTER GOLLNICK Accordion Patent Print Art |
| 1940 WALTER MILLSAP Periodic Switch Patent Print |
| 1940 TORRENCE WALTER Fishing Reel Patent Print |
| 1940 PETERSON WALTER Fishhook Patent Print Art |
| 1940 STROM WALTER Tackle Box Patent Print Art |
| 1940 WALTER A GREINER Basket Carriage Patent |
| 1940 LAMBERT WALTER Conveying Rig Patent Print |
| 1940 WALTER HEINIGER Game Patent Print Art |
| 1940 WALTER Water Aquatic Game Art Print Patent |
| 1940 PASEK WALTER Airplane Toy Patent Print Art |
| 1940 KRUMDICK WALTER Fishhook Patent Print Art |
| 1940 LEGG WALTER Fishing Rod Holder Patent Print |
| 1940 WALTER RUDOLPH Automobile Signal Patent |
| 1940 PRICE WALTER Game Device Patent Print Art |
| 1940 GIBBS WALTER Animal Trap Patent Print Art |
| 1940 THADA WALTER Animal Trap Patent Print Art |
| 1940 WALTER Golf Ball Retriever Patent Print Art |
| 1940 WALTER Educational Game Apparatus Patent |
| 1940 HUGHES WALTER Program Control Patent Print |