| 1942 COTTRELL Spring Control Unit Patent Print |
| 1930 COTTRELL WILLIAM Airplane Wing Patent Print |
| 1955 COTTRELL ROBERT Brake Beam Patent Print Art |
| 1959 COTTRELL ROBERT Snubber Patent Print Art |
| 1947 COTTRELL ROBERT Car Truck Patent Print Art |
| 1944 COTTRELL ROBERT Car Truck Patent Print Art |
| 1956 COTTRELL ROBERT Spring Group Patent Print |
| 1956 COTTRELL ROBERT Brake Beam Patent Print Art |
| 1956 COTTRELL Draft Gear Housing Patent Print |
| 1949 COTTRELL ROBERT Spring Group Patent Print |
| 1943 COTTRELL ROBERT Car Truck Patent Print Art |
| 1950 COTTRELL Brake Beam Casting Patent Print |
| 1942 COTTRELL ROBERT Side Frame Patent Print Art |
| 1950 COTTRELL ROBERT Snubbed Truck Patent Print |
| 1949 COTTRELL Spring Plank Mounting Patent Print |
| 1942 COTTRELL Railway Car Truck Patent Print Art |
| 1946 COTTRELL Side Frame Structure Patent Print |
| 1946 COTTRELL ROBERT Car Truck Patent Print Art |
| 1942 COTTRELL ROBERT Side Bearing Patent Print |
| 1950 COTTRELL ROBERT Brake Beam Patent Print Art |
| 1966 COTTRELL Towed Soaring Craft Patent Print |
| 1949 COTTRELL Journal Connection Patent Print |
| 1942 COTTRELL ROBERT Draft Gear Patent Print Art |
| 1942 COTTRELL Stabilizing Device Patent Print |
| 1957 COTTRELL Package Spring Group Patent Print |
| 1959 COTTRELL Bolster Stabilizer Patent Print |
| 1944 COTTRELL ROBERT Side Bearing Patent Print |
| 1950 COTTRELL Truck Arrangement Patent Print Art |
| 1945 COTTRELL ROBERT Car Truck Patent Print Art |
| 1965 COTTRELL Carousel Mechanism Patent Print |
| 1959 COTTRELL Golf Training Device Patent Print |
| 1945 COTTRELL ROBERT Snubber Patent Print Art |
| 1948 COTTRELL ROBERT Car Truck Patent Print Art |
| 1942 COTTRELL ROBERT Car Truck Patent Print Art |
| 1942 COTTRELL ROBERT Snubber Patent Print Art |
| 1942 COTTRELL Ride Control Unit Patent Print Art |
| 1944 COTTRELL ROBERT Side Frame Patent Print Art |
| 1955 COTTRELL NEWTON Sewing Machine Patent Print |
| 1956 COTTRELL ROBERT Car Truck Patent Print Art |
| 1950 COTTRELL ROBERT Spring Group Patent Print |
| 1946 COTTRELL ROBERT Snubber Patent Print Art |
| 1957 COTTRELL Snubbed Bolster Truck Patent Print |
| 1951 COTTRELL ROBERT Snubbed Truck Patent Print |
| 1945 COTTRELL ROBERT Friction Shoe Patent Print |
| 1942 COTTRELL ROBERT Railway Truck Patent Print |
| 1945 COTTRELL ROBERT Spring Group Patent Print |