| 1922 OTHO H BYRUM Signal Patent Print Art |
| 1922 LANGMUIR Wireless Signal System Patent 7557 |
| 1922 SPRINGFIELD GARLAND Signal Patent Print Art |
| 1922 KENTUCKY SWITCH SIGNAL IN Automatic Track Switch |
| 1922 LOUIS FRIED Thief Signal Patent Print Art |
| 1922 PURITON MFG CORP Signal Patent Print Art |
| 1922 EIGABROADT Signal Indicator System Patent |
| 1922 A M BIRD Signal Flag Support Patent Print |
| 1922 NAT SAFETY S Signal Governing Art Print |
| 1922 GEORGE Automatic Railroad Signal Stop Art |
| 1922 SUBMARINE SIGNAL CO Ship Protection Patent |
| 1922 HARRINGTON Railway Signal Torpedo Patent |
| 1922 ZEPKA Theft Signal Motor Vehicles Art Print |
| 1922 OCHS RALPH Auto Theft Signal Patent Print |
| 1922 CRAWFORD Electric Signal Electric Railways |
| 1922 RUPERT Railroad Crossing Signal Mechanism |
| 1922 CENTRAL RAILWAY SIGNAL Railway Signal Torpedo |
| 1922 SUBMARINE SIGNAL CO Diaphragm Tuning Patent |
| 1922 MEDEN Design Traffic Signal AMERICAN Patent 49514 |
| 1922 MONROE JONES Signal Patent Print Art |
| 1922 FRANK Explosive Tablet Railway Signal Torpedoes |
| 1922 FRANK Railway Signal Torpedo Patent Print |
| 1922 EMANUEL Signal For Motor Vehicles Patent |
| 1922 HAMMOND Light Signal System Patent Print |
| 1922 MURPHY Automatic Safety Signal Device Art |
| 1922 GREGORY WILLIAM Signal System Patent Print |
| 1922 PIERCE Railway Crossing Gate Signal Patent |
| 1922 A I WOODRING Signal Governing Art Print |
| 1922 WOODRING Signal Governing Apparatus Patent |
| 1922 E A LAB INC Signal Motor Vehicles Art Print |
| 1922 CONLEY Signal Flag Support Patent Print Art |
| 1922 PRESTON Signal Lamp Lens EDMUNDS Patent 49512 |
| 1922 RUSSELL HERBERT Signal Gun Patent Print Art |
| 1922 SKARTCHSEARIS Railway Switch Signal Mechanism |
| Old 1922 Army Signal Corps Radio Book wireless |
| 1922 GMC Tacoma DPW Truck Ad Street Light Signal |