| 1945 GEN Highway Crossing Signal System Art |
| 1945 UNION SWITCH SIGNAL CO Annunciating Indicating |
| 1945 CENTRAL RAILWAY SIGNAL Igniter Grenades Like |
| 1945 UNION SWITCH SIGNAL CO Locking Means Assemblies |
| 1945 CAMERON HAROLD Audible Signal Patent Print |
| 1945 GEN RAILWAY SIGNAL CO Oscillating Code Transmitter |
| 1945 DOUGLASS MYRL Light Signal Patent Print Art |
| 1945 MARKS PRODUCTS INC Musical Signal Art |
| 1945 HITT Daylight Floating Smoke Signal Patent |
| 1945 MCINNES Multiple Signal Discharger Patent |
| 1945 UNION SWITCH SIGNAL CO Front Rod Railway Switches |
| 1945 UNION SWITCH SIGNAL CO Code Detecting Means |
| 1945 GROHSGAL Musical Signal Device Patent Print |
| 1945 SHANKLIN WILLIAM Theft Signal Patent Print |
| 1945 PFEIL Floating Signal Light Patent Print |
| 1945 UNION SWITCH & SIGNAL CO Electric Lock Art |
| 1945 JEROME ARTHUR Light Signal Patent Print Art |
| 1945 DAALEN Illuminated Signal Lifesaving Equipment |
| 1945 UNION SWITCH & SIGNAL CO Light Signal Art |
| 1945 UNION SWITCH SIGNAL CO Hot Bearing Alarm |
| 1945 UNION SWITCH SIGNAL CO Indicating Art |
| 1945 UNION SWITCH SIGNAL CO Vehicle Counting |
| 1945 UNION SWITCH SIGNAL CO Railway Switch Operating |
| 1945 UNION SWITCH SIGNAL CO Railway Track Circuit |
| 1945 UNION SWITCH SIGNAL CO Remote Control System |
| 1945 UNION SWITCH SIGNAL CO Railway Braking Art |
| 1945 JOLLY JAMES Vehicle Signal Patent Print Art |
| 1945 HARRY A BIESSING Airport Landing Signal |
| 1945 UNION SWITCH SIGNAL CO Coded Track Circuits |
| 1945 ALEXANDER Highway Crossing Signal System |
| 1945 LIEBMANN Airport Landing Signal Art Print |
| 1945 H H WILLIAMSON Thief Signal Patent Print |
| 1945 UNION SWITCH SIGNAL CO Electrical Controlling |
| 1945 UNION SWITCH SIGNAL CO Railway Switch Controlling |
| 1945 UNION SWITCH SIGNAL CO Interlocking Control |
| 1945 GEN RAILWAY SIGNAL CO Railway Signaling System |
| 1945 JOHNSON CHARLES Thief Signal Patent Print |
| 1945 Esquire VARGA Girl Center Pin-Up WARNING SIGNAL |
| 1945 Dot Larsen signed Indian postcard,THE SIGNAL,brave |