| 1921 DODD ALVIN Audible Signal Patent Print Art |
| 1948 RHODES Audible Time Signal Patent Print Art |
| 1942 BOLZ Audible Signal Device Patent Print Art |
| 1920 WILLIAMS Audible Theft Alarm Signal Automobiles |
| 1944 STANDARD Electromagnetic Audible Signal Art |
| 1938 GAYNOR Audible Electric Signal Patent Print |
| 1944 KENERSON Electromagnetic Audible Signal Art |
| 1964 WHEELOCK SIGNALS INC Audible Signal Art |
| 1945 CAMERON HAROLD Audible Signal Patent Print |
| 1935 SCHWARZE ELECTRIC Audible Signal Art Print |
| 1936 HARRISON Audible Signal Device Patent Print |
| 1939 EAVES Audible Railroad Signal Patent Print |
| 1966 WALLACE TIERNAN INC Audible Signal Art |
| 1940 SCOFIELD Audible Warning Signal Patent |
| 1940 SPARKS WITHINGTON CO Audible Warning Signal |
| 1935 VASOLD LEO Audible Signal Patent Print Art |
| 1953 BELL Audible Signal Field Telephone Sets |
| 1935 WATERBURY Electrically Operated Audible Signal |
| 1966 GENE Audible Signal Apparatus Patent Print |
| 1937 NEW HAVEN CLOCK Audible Signal Clock Art |
| 1953 WALTER Audible Signal Field Telephone Sets |
| 1942 E INGRAHAM Audible Signal Clock Art Print |
| 1961 MARR Combination Audible Visible Signal Ships |
| 1936 CARL Audible Electric Signal Patent Print |
| 1936 PIPKIN Audible Signal Device Patent Print |
| 1939 CARL H FOWLER Audible Railroad Signal Art |
| 1942 EMIL AGER Audible Signal Clock Patent Print |
| 1942 BELL TELEPHONE LABOR INC Audible Signal |
| 1932 E Synchronous Motor Electric Audible Signal Clock |
| 1923 FERREOL Audible Signal Vibratory Diaphragm Type |
| 1935 PUTNAM Electrically Operated Audible Signal |
| 1997 YOUNG Baseball Bat Audible Signal Patent 46113 |
| 1923 DINSMOOR Audible Signal Device Patent Print |
| 1931 E Synchronous Motor Electric Audible Signal Clock |
| 1948 RHODES INC M H Audible Time Signal Patent |
| 1937 PORTER Audible Signal Clock Patent Print |
| 1948 POOLE Electromagnetic Audible Signal Art |
| 1964 RUSSO Audible Signal Device Patent Print |
| Audible Sky Signal CD $2.50 USA s/h |
| Edwards GS Horn 876-N5 120V AC 0.13 Amp Audible Signal |