| 1939 KERSHAW Automatic Slack Adjuster Patent |
| 1934 CAMP Automatic Slack Adjuster Patent Print |
| 1961 HOWARD Automatic Slack Adjuster Patent |
| 1934 ANDERSON Automatic Slack Adjuster Patent |
| 1937 HEWITT Automatic Slack Adjuster Patent |
| 1937 MOODY Automatic Slack Adjuster Patent Print |
| 1936 HENRY Automatic Slack Adjuster Patent Print |
| 1932 ANDERSON Automatic Slack Adjuster Patent |
| 1936 HANS Automatic Slack Adjuster Patent Print |
| 1932 CAMP Automatic Slack Adjuster Patent Print |
| 1956 DOREY Automatic Slack Adjuster Patent Print |
| 1961 MCCLURE Automatic Slack Adjuster Patent |
| 1958 DOREY Automatic Slack Adjuster Patent Print |
| 1938 SCHWENTLER Automatic Slack Adjuster Patent |
| 1933 CAMP Automatic Slack Adjuster Patent Print |
| 1958 MAURITZ Automatic Slack Adjusters Patent |
| 1920 HUNZICKER Automatic Slack Adjuster Patent |
| 1933 HENRY Automatic Slack Adjuster Patent Print |
| 1937 WILLIAMSON Automatic Slack Adjuster Patent |
| 1956 HENRY Automatic Slack Adjuster Patent Print |