| 1926 KELLENBERGER KEITH Car Retarder Patent |
| 1964 BROWN Automatic Car Retarder Patent Print |
| 1929 LAFFEY WILLIAM Car Retarder Patent Print |
| 1965 DEVANEY Railroad Car Retarder Patent Print |
| 1933 CRAGO Railway Car Retarder Patent Print Art |
| 1957 FIELD Railway Car Retarder Patent Print Art |
| 1950 CAINE STEEL COMPANY Car Retarder Patent |
| 1931 FERNAND Railway Car Retarder Patent Print |
| 1935 BROWN Magnetic Car Retarder Patent Print |
| 1934 BROWN Car Retarder For Railroads Patent |
| 1965 LYLE Car Retarder Control System Patent |
| 1929 ROSS Magnetic Car Retarder Patent Print Art |
| 1946 CLARK Railway Car Retarder Patent Print Art |
| 1930 HOWARD LEMUEL Car Retarder Patent Print Art |
| 1932 LIVINGSTON Railway Car Retarder Patent |
| 1960 AMERICAN BRAKE SHOE CO Car Retarder Patent |
| 1966 MARS Adjustable Car Retarder Patent Print |
| 1933 AUGUST Eddy Current Car Retarder Patent |
| 1930 BONE HERBERT Railway Car Retarder Patent |
| 1932 BROWN Car Retarder For Railroads Patent |
| 1930 MCWHIRTER Railway Car Retarder Patent Print |
| 1955 LOWE Railroad Car Impact Retarder Patent |
| 1957 LOWE Railway Car Impact Retarder Patent |
| 1932 VARBLE JOHN Car Retarder Patent Print Art |
| 1960 DEVANEY JOHN Car Retarder Patent Print Art |
| 1959 BODKIN Railway Car Retarder Patent Print |
| 1932 VARBLE Car Retarder Patent Print Art |
| 1950 BELTMAN GEORGE Car Retarder Patent Print |
| 1935 BROWN Car Retarder For Railroads Patent |
| 1935 BONE Car Retarder Structure Patent Print |
| 1948 BODKIN Railway Car Retarder Patent Print |
| 1931 CLAUSEN Railway Car Retarder Patent Print |
| 1925 SHEPARD Railway Car Retarder Patent Print |