| 1944 STAPLES Coded Railway Signaling Art Print |
| 1944 SUBMARINE SIGNAL CO Submarine Signaling Art |
| 1944 SCHEG Coded Track Circuit Signaling System |
| 1944 UNION Coded Track Circuit System Railway Signaling |
| 1944 RCA CORP Traffic Transportation Signaling System |
| 1944 UNION SWITCH SIGNAL CO Coded Railway Signaling |
| 1944 GEN Coded Track Circuit Signaling System |
| 1944 WELLS Control Railway Signaling Means Art |
| 1944 UNION SWITCH SIGNAL CO Railway Signaling System |
| 1944 FISH Electric Signaling Apparatus Patent |
| 1944 STAPLES Coded Signaling System Patent Print |
| 1944 LONGFELLOW Submarine Signaling Patent Print |
| 1944 EDWARDS INC Electric Signaling Art Print |
| 1944 LONGFELLOW Submarine Signaling Art Print |
| 1944 REICHARD Coded Track Circuit Signaling System |
| 1944 ZANE Railway Signaling System Patent Print |
| 1944 SUBMARINE SIGNAL CO Submarine Signaling |
| 1944 UNION SWITCH SIGNAL CO Coded Signaling System |
| 1944 GEORGE BLAIR Signaling Device Patent Print |
| 1944 ANDREW Railway Signaling System Patent |
| 1944 PFLASTERER Railway Signaling System Patent |
| 1944 KELLOGG Traffic Transportation Signaling System |
| 1944 IVEY JACK Signaling System Patent Print Art |
| 1944 AMERICAN SIGNAL Signaling System Art Print |
| 1944 UNION Control Railway Signaling Means Art |
| October 1944 Scouting BSA Boy Signaling |