| 1950 UNION SWITCH SIGNAL CO Traffic Protection |
| 1950 MARKS Hotbox Indicator And Signal Patent |
| 1950 GEN RAILWAY SIGNAL CO Timing Device Patent |
| 1950 RICKABAUGH Illuminated Football Down Signal |
| 1950 KOVAC Bowling Alley Signal Switch Patent |
| 1950 GEN RAILWAY SIGNAL CO Voice Frequency Signal |
| 1950 GRACEY Torpedo Signal For Railways Patent |
| 1950 UNION SWITCH SIGNAL CO Torpedo Signal Railways |
| 1950 BARKER Voice Frequency Signal Device Patent |
| 1950 UNION SWITCH SIGNAL CO Railway Switch Lock |
| 1950 UNION SWITCH SIGNAL CO Control Unit Light Signals |
| 1950 UNION SWITCH SIGNAL CO Coded Track Circuit |
| 1950 SHAW Newspaper Delivery Boxes Signal Patent 41396 |
| 1950 BRAUN Signal Device For Game Pieces Patent |
| VINTAGE 1950 MILITARY SIGNAL CORPS TOASTER TELEPHONE |
| VINTAGE 1950-S UNOPENED MUSICAL SPACE SIGNAL TOY. |
| NICE 1950 LIONEL TRAINS 155 RINGING HIGHWAY SIGNAL |
| 1950 Lake Placid Signal Hill Whiteface Mt Postcard |
| VINTAGE 1950 MILITARY SIGNAL CORPS TOASTER TELEPHONE |
| 1950 MHz signal source |
| Vintage 1950's SIGNAL POLICE WHISTLE w/ WOODEN BALL |