| 1930 ENRIQUE Automatic Railroad Gate Patent |
| 1928 MATTHEW Automatic Railway Gate Patent Print |
| 1937 CLARK Automatic Crossing Gate Patent Print |
| 1928 PURDY Automatic Railroad Gate Patent Print |
| 1932 IMRE Automatic Railroad Gate Patent Print |
| 1929 GIUSEPPE Automatic Railroad Gate Patent |
| 1933 DAY Automatic Railway Crossing Gate Patent |
| 1928 ADAM Automatic Railway Gate Patent Print |
| 1924 BERNARD Automatic Railroad Gate Patent |
| 1930 GROVE Automatic Railway Gate Patent Print |
| 1926 NORMAN Automatic Railway Gate Patent Print |
| 1921 MCGEE Automatic Railway Gate Patent Print |
| 1928 MOYER Automatic Railway Gate Patent Print |
| 1920 JOSEPH Automatic Railway Gate Patent Print |
| 1920 JACOB Automatic Railway Gate Patent Print |
| 1922 HENRY Automatic Railway Gate Patent Print |
| 1929 HAND Automatic Gate For Railroads Patent |
| 1920 PROCTOR Automatic Safety Gate Patent Print |
| 1932 VINCENT ORVILLE Automatic Gate Patent Print |
| 1927 MUSSELMAN Automatic Railway Gate Patent |
| 1924 BALEY Automatic Railway Gate Patent Print |
| 1925 WHITEHURST Automatic Crossing Gate Patent |
| 1963 SMITH Automatic Tail Gate Release Patent |
| 1930 LADD THEODORE Automatic Gate Patent Print |
| 1928 ARTHUR Automatic Railway Gate Patent Print |
| 1928 KOVACS Automatic Gate For Railways Patent |
| 1933 MCWHIRTER Automatic Crossing Gate Patent |
| 1935 ROPER EDWARD Automatic Gate Patent Print |
| 1930 JACK R STEPHENS Automatic Gate Patent Print |
| 1874 ELLIS Automatic Horse Gate Patent 11457 |
| 1933 BYRNE Automatic Crossing Gate Patent Print |
| 1920 PETRO Automatic Railroad Gate Patent Print |
| 1921 FRANK Automatic Railroad Gate Patent Print |
| 1928 ZOLTAN Automatic Railroad Gate Patent Print |
| 1852 BROWN Automatic Gate Design Patent 10156 |
| 1930 ADAM Automatic Railway Gate Patent Print |
| 1925 HANSEN Automatic Sliding Tail Gate Patent |