| 1921 DODD ALVIN Audible Signal Patent Print Art |
| 1948 RHODES Audible Time Signal Patent Print Art |
| 1942 BOLZ Audible Signal Device Patent Print Art |
| 1945 JAMES Audible Stall Indicator Patent Print |
| 1938 GAYNOR Audible Electric Signal Patent Print |
| 1945 CAMERON HAROLD Audible Signal Patent Print |
| 1974 EBDON Audible Rocking Pendulum PERRY Patent 25094 |
| 1936 HARRISON Audible Signal Device Patent Print |
| 1939 EAVES Audible Railroad Signal Patent Print |
| 1940 SCOFIELD Audible Warning Signal Patent |
| 1968 CLARK Locally Audible Sound System Patent |
| 1935 VASOLD LEO Audible Signal Patent Print Art |
| 1959 TIBBOTT Audible Multitone Alarm Patent |
| 1939 NAYLOR Audible Timer FINK ROSELIEVE Patent 24540 |
| 1920 HOWELL Audible Alarm For Vehicles Patent |
| 1936 WEISS Audible Mechanical Toy Patent Print |
| 1966 GENE Audible Signal Apparatus Patent Print |
| 1934 LEO SOMMER Radio Audible Signals Patent |
| 1951 AUTH Audible Signaling Device Patent Print |
| 1953 WILLIAM Audible And Visible Alarm Patent |
| 1936 CARL Audible Electric Signal Patent Print |
| 1936 PIPKIN Audible Signal Device Patent Print |
| 1961 HENRY Audible Fishing Lure Patent Print Art |
| 1956 SHAW HORACE Audible Shuttlecocks Patent |
| 1925 REYNOLDS Audible Signaling Device Patent |
| 1942 EMIL AGER Audible Signal Clock Patent Print |
| 1997 YOUNG Baseball Bat Audible Signal Patent 46113 |
| 1923 DINSMOOR Audible Signal Device Patent Print |
| 1961 RAYTHEON CO Audible Fish Alarms Patent |
| 1974 HENDERSON JENKINS Audible Toy MATTEL Patent 38144 |
| 1948 RHODES INC M H Audible Time Signal Patent |
| 1937 PORTER Audible Signal Clock Patent Print |
| 1920 HOWARD Audible Alarm For Automobiles Patent |
| 1961 LEONARD Audible Fish Alarms Patent Print |
| 1964 WALLACE Electronic Audible Horn Patent |
| 1964 RUSSO Audible Signal Device Patent Print |
| 1963 JOHN TAY Audible Fish Lures Patent Print |
| 1920 CHARLES Audible Signaling Device Patent |