| 1934 DAVIS Air Conditioning Passenger Cars Art |
| 1935 MARSHALL Air Conditioning For Cars Patent |
| 1935 PULLMAN CAR CORP Air Conditioning Cars Art |
| 1950 WESTINGHOUSE Air Conditioning Railway Cars |
| 1933 MELCHER Air Conditioning System Railway Cars |
| 1932 VULPEN Air Conditioning Railway Cars Art |
| 1938 PENNSYLVANIA Air Conditioning Passenger Cars |
| 1934 KIESEL Air Conditioning Railway Cars Art |
| 1937 PENNSYLVANIA Air Conditioning Passenger Cars |
| 1933 AMERICAN Air Conditioning System Railway Cars |
| 1934 B F STURTEVANT CO Air Conditioning Passenger Cars |
| 1932 VAPOR Air Conditioning Railway Cars Art |
| 1935 DAVIS Air Conditioning Method Passenger Cars |
| 1932 RUSSELL Air Conditioning Railway Cars Art |
| 1938 WHITSLTT Air Conditioning Railway Cars Art |
| 1933 WALLACE Air Conditioning System Railway Cars |
| 1935 B Air Conditioning Method Passenger Cars |
| 1938 MADDEN Air Conditioning Passenger Cars Art |
| 1950 RITTER Air Conditioning Railway Cars Art |
| 1937 MADDEN Air Conditioning Passenger Cars Art |