| 1957 ALLER Outlet Valve For Hoppers Patent Print |
| 1957 GARRETT CORP Butterfly Type Safety Valve |
| 1957 DAUDELIN High Pressure Control Valve Patent |
| 1957 ALEXANDER Slave Valve Flow Distribution Means |
| 1957 SEBASTIAN Pipe Organ Valve Action Patent |
| 1957 TERLATO Valve Tearing Doll Patent Print |
| 1957 BEYER Adjustable Valve For Dampers Patent |
| 1957 CLARENCE Timer Controlled Valve Patent |
| 1957 LOCKHEED AIRCRAFT CORP Hydraulic Transfer Valve |
| 1957 MILLER Valve For Musical Instruments Patent |
| 1957 HARP Hydraulic Transfer Valve Patent Print |
| 1957 BURRELL Flange Lubricator Metering Valve |
| 1957 HOSKING OAKLEY Life Raft Valve Patent Print |
| 1957 ANDERSON Valve Musical Instruments Art |
| 1957 BOOTH Fuel Supply System Valve Art Print |
| 1957 GEN AM TRANSPORT Outlet Valve Hoppers Art |
| 1957 UNITED AIRCRAFT PROD Fuel Supply System Valve |
| 1957 BOUMA Pipe Organ Wind Chest Valve Action |
| 1957 JOSEPH Valve Device For Tearing Doll Patent |
| 1957 LUIGI Breathing Valve A Submarine Mask Art |
| 1957 ALBERT Valve For Musical Instruments Patent |
| 1957 SCHNURR Surge Relief By Pass Valve Art |
| 1957 DONALD Valve Musical Instruments Art Print |
| 1957 JENSEN Butterfly Type Safety Valve Patent |
| 1957 MAGALIK Mechanical Valve An Accordion Reed |
| 1957 HOSKING Life Raft Valve Patent Print Art |
| 1957 FREEMAN Valve Control Dual Rotation Propeller |