| 1921 FRITZ Electric Winding Device Patent Print |
| 1950 JOSEPH Electric Blasting Device Patent |
| 1949 OLIN IND INC Electric Firing Device Patent |
| 1941 CARLSON Electric Timing Device Patent Print |
| 1931 WESTERN ELECTRIC CO Signaling Device Patent |
| 1940 MYERS Electric Tempo Device Patent Print |
| 1940 BATES Electric Timing Device Patent Print |
| 1928 COOKE Electric Switching Device Patent |
| 1957 GEN ELECTRIC Interval Timing Device Patent |
| 1938 GEN ELECTRIC Control Device Patent Print |
| 1950 HARTON Electric Squib Firing Device Patent |
| 1924 WARREN Electric Signal Device Patent Print |
| 1941 GEN ELECTRIC Time Delay Device Patent Print |
| 1938 GEN ELECTRIC Restraint Device Patent Print |
| 1956 GEN ELECTRIC Timing Device Patent Print Art |
| 1960 COOK ELECTRIC CO Antiskid Device Patent |
| 1955 GEN ELECTRIC Ventilating Device Patent |
| 1920 ROOT Electric Signaling Device Patent Print |
| 1930 SCOTT Electric Alarm Device Patent Print |
| 1959 FLEMING Electric Arming Device Patent Print |
| 1932 RALPH Electric Switch Device Patent Print |
| 1934 ALDIS Electric Clock Setting Device Patent |
| 1958 HANS Electric Timing Device Patent Print |
| 1953 FRANK Electric Signaling Device Patent |
| 1929 WESTERN ELECTRIC CO Acoustic Device Patent |
| 1938 GEN ELECTRIC Sound Producing Device Patent |
| 1944 GEN ELECTRIC Restraint Device Patent Print |
| 1953 DAVID Electric Timing Device Patent Print |
| 1962 WEBER Electric Signaling Device Patent |
| 1952 GEN ELECTRIC Brake Rigging Device Patent |
| 1915 HUGHES Electric Lighting Device Patent 21834 |
| 1922 GEN ELECTRIC Timing Device Patent Print Art |
| 1958 GEN ELECTRIC Electric Timing Device Patent |
| 1946 OHL Light Sensitive Electric Device Patent |
| 1936 GEN ELECTRIC Axle Restraint Device Patent |
| 1925 EDUARDO RABONI Electric Device Patent Print |
| 1880 FRACE Electric Egg Testing Device Patent 11193 |
| 1957 GEN ELECTRIC Ventilating Device Patent |
| 1949 GEN ELECTRIC Control Device Patent Print |
| 1922 CECIL Electric Contacting Device Patent |
| 1959 MICROLOC CORP Electric Arming Device Patent |
| 1925 GEN ELECTRIC Time Element Device Patent |
| 1928 TULLOCH Electric Switch Device Patent Print |
| 1949 SEAVEY Electric Firing Device Patent Print |
| 1946 GEN ELECTRIC Control Device Patent Print |
| 1931 ELECTRIC BOAT CO Safety Device Patent Print |
| 1934 GEN ELECTRIC Flash Light Device Patent |
| 1926 GEORGE Pneumato Electric Device Patent |
| 1963 HENRY Electric Barrier Device Patent Print |
| 1960 SMITH Electric Signal Device Patent Print |
| 1929 GEN ELECTRIC Restraining Device Patent |
| 1934 LOEFFLER Electric Signaling Device Patent |
| 1925 GEN ELECTRIC Timing Device Patent Print Art |
| 1920 WESTERN ELECTRIC CO Acoustic Device Patent |
| 1933 LOEFFLER Electric Signaling Device Patent |
| 1931 NIKOLAUS Electric Mine Firing Device Patent |
| 1943 GEN ELECTRIC Time Delay Device Patent Print |
| 1965 GREGOROFF Electric Sounding Device Patent |
| 1932 MYERS Electric Alarm Device Patent Print |
| 1943 JENSEN Electric Target Device Patent Print |
| 1934 GEN ELECTRIC CO LTD Lighting Device Patent |