| 1932 LINDSEY Electric Alarm Clock Patent Print |
| 1949 SESSIONS Electric Alarm Clock Patent Print |
| 1930 SCOTT Electric Alarm Device Patent Print |
| 1923 HENRY G FRAZIER Electric Alarm Clock Patent |
| 1899 WOODMAN Electric Alarm NATIONAL FIRE Patent 18334 |
| 1940 GEN ELECTRIC Time Switch Alarm Patent Print |
| 1945 SAMUEL Electric Alarm Clock Patent Print |
| 1938 ANDERSON BERT Electric Alarm Patent Print |
| 1886 DERRICK Electric Alarm Clock Patent 12546 |
| 1951 JOSEPH Electric Alarm Clock Patent Print |
| 1943 CLOUD Electric Burglar Alarm Patent Print |
| 1925 HENRY Electric Alarm Clock Patent Print Art |
| 1884 KEEP Electric Child Alarm Mounted On Bed Patent 60 |
| 1924 STECKEL HARRY Electric Alarm Patent Print |
| 1923 BURLEIGH Electric Alarm Clock Patent Print |
| 1940 HUTCHINSON Electric Alarm Clock Patent |
| 1949 KATHYRINE Electric Burglar Alarm Patent |
| 1943 BENTLEY Electric Alarm Clock Patent Print |
| 1952 CALLAGHER Electric Alarm Clock Patent Print |
| 1958 GEN ELECTRIC Alarm Clock Movement Patent |
| 1933 TWEEDALE Electric Alarm Clock Patent Print |
| 1952 INT REGISTER CO Electric Alarm Clock Patent |
| 1932 MYERS Electric Alarm Device Patent Print |
| 1936 LAURENS Electric Alarm Clock Patent Print |