| 1929 JAN Automatic Railroad Crossing Gate Signal |
| 1929 WILLIAM Automatic Railroad Safety Gate Art |
| 1929 INT MOTOR CO Double Acting Tail Gate Dump Trucks |
| 1929 GIUSEPPE Automatic Railroad Gate Patent |
| 1929 IRSIK Railroad Crossing Gate Patent Print |
| 1929 PAUL Hinged Gate Testing Cylinders Submarines |
| 1929 MULCH Automatic Railroad Crossing Gate Art |
| 1929 COOK Tail Gate Mounting Means Patent Print |
| 1929 COOK WILLIAM Railway Gate Patent Print Art |
| 1929 HAND Automatic Gate For Railroads Patent |
| 1929 JOE DI LISIO Railroad Crossing Gate Patent |
| 1929 PHILLIPS Railroad Crossing Gate Patent |
| 1929 NEIN Double Acting Tail Gate Dump Trucks |
| 1929 HUDSON COAL Tail Gate Mounting Means Art |
| 1929 RUFFING End Gate Extension Mine Cars Art |
| 1929 LOUIS LAMAGNA Crossing Gate Patent Print |
| 1929 NEELD CHARLES Safety Gate Patent Print Art |
| 1929 ANTONIO Safety Gate For Railways Patent |
| 1929 MARIANO Railroad Crossing Gate Patent Print |
| 1929 JOHN A SHAFER ORA C KING Railway Gate Art |
| 1929 ANTONIO RAGAZZO Automatic Railroad Gate Art |
| 1929 ARMENAG Automatic Electromagnetic Railroad Gate |
| 1929 PRATH Railroad Crossing Gate Patent Print |