| 1966 Portable Hydraulic Lifting Device Patent |
| 1962 KELLER Hydraulic Shock Absorbing Device Art |
| 1967 Portable Hydraulic Lifting Device Patent |
| 1933 ORA BUNDY Hydraulic Loading Device Patent |
| 1933 PIERCE Hydraulic Loading Device Patent |
| 1959 WASSEL Hydraulic Cam Device Patent Print |
| 1925 HANS Hydraulic Tilting Device Patent Print |
| 1970 WALZ Hydraulic Regulating Device Patent |
| 1949 PIERRE Hydraulic Control Device Patent |
| 1960 EMERY Hydraulic Slack Adjusting Device Art |
| 1949 THOMAS Hydraulic Boost Device Patent Print |
| 1946 RENE Hydraulic Remote Control Device Patent |
| 1960 NOVAK Hydraulic Brake Locking Device Patent |
| 1951 JACOBUS Hydraulic Steering Device Patent |
| 1946 SIAM Hydraulic Remote Control Device Patent |
| 1964 PETERSON Hydraulic Cushion Device Patent |
| 1968 EUGENE Hydraulic Propulsion Device Patent |
| 1964 PULLMAN INC Hydraulic Cushion Device Patent |
| 1966 KARBOWNICZEK Hydraulic Device Patent |
| 1969 SUZUKI Hydraulic Lock Device Patent Print |