| 1920 JAMES Electric Guiding Mechanism Patent |
| 1926 BROWN Electric Tracker Mechanism Patent |
| 1934 IBM Electric Clock Mechanism Patent Print |
| 1934 SHERMUND Electric Motor Mechanism Patent |
| 1958 GEN ELECTRIC Timing Mechanism Patent Print |
| 1925 KUNKLE Electric Motor Mechanism Patent |
| 1940 JOHN Electric Clock Mechanism Patent Print |
| 1956 GEN ELECTRIC Calendar Mechanism Patent |
| 1948 GEN ELECTRIC Sear Mechanism Patent Print |
| 1950 GEN ELECTRIC Sear Mechanism Patent Print |
| 1942 COFFEY Electric Switch Mechanism Patent |
| 1931 MAX Electric Clock Driving Mechanism Patent |
| 1947 ARTHUR Electric Clock Mechanism Patent |
| 1962 GEN ELECTRIC Sealing Mechanism Patent Print |
| 1934 LARRABEE Electric Clock Mechanism Patent |
| 1935 SHEKTER Electric Switch Mechanism Patent |
| 1942 LEONARD Electric Switch Mechanism Patent |
| 1945 HOLLY Electric Brake Mechanism Patent Print |
| 1934 ALBRIGHT Electric Clock Mechanism Patent |
| 1938 IVAN Electric Clock Mechanism Patent Print |
| 1955 DE Electric Watch Setting Mechanism Patent |
| 1931 POOLE Electric Clock Mechanism Patent Print |
| 1949 POLLOCK Electric Firing Mechanism Patent |
| 1930 DOUGLAS Electric Switching Mechanism Patent |
| 1936 WHITEHEAD Electric Timing Mechanism Patent |
| 1945 GEN ELECTRIC Regulating Mechanism Patent |
| 1963 GEN ELECTRIC Recoil Mechanism Patent Print |
| 1959 BEISER Electric Clock Mechanism Patent |
| 1941 LLOYD Electric Timing Mechanism Patent |
| 1951 GEN ELECTRIC Control Mechanism Patent Print |
| 1941 HULL Electric Switch Mechanism Patent Print |