| 1939 AMERICAN TELEPHONE TELEGRAPH Cabscope Art |
| 1939 HARRY Toy Telephone With Television Effect |
| 1939 BELL TELEPHONE LABOR INC Electronic Organ |
| 1939 BELL TELEPHONE LABOR INC Magnetic Telegraphone |
| 1939 BELL TELEPHONE LABOR INC Impulse Producing Circuit |
| 1939 RIESZ Wave Translation BELL TELEPHONE Patent 19999 |
| 1939 LUM Wall Telephone Unit Design BELL Patent 41251 |
| 1939 BELL TELEPHONE LABOR INC Acoustic Damping Material |
| 1939 BELL TELEPHONE LABOR INC Vibratory System |
| 1939 CARL BIXEL Cabscope AMERICAN TELEPHONE TELEGRAPH |
| 1939 BELL TELEPHONE LABOR INC Signaling System |
| 1939 BELL TELEPHONE LABOR INC Signaling Art |
| 1939 BELL TELEPHONE LABOR INC Tone Generator Art |
| 1939 BELL TELEPHONE LABOR INC Electron Discharge |
| Poland 1939 PSC Telephone Center |
| 1939 Bell Telephone Advertising Window Card Flying Coin |
| New York World Fair 1939 Bell Telephone Bldg. Postcard |
| 1939 VINTAGE TELEPHONE IN AMERICA BOOK A.T.&T |
| New York World Fair 1939 Bell Telephone Bldg. Postcard |
| 1939 World's Fair List Finder (Telephone Directory). |