| 1891 FISHER Cut Out Electric Circuits Patent 47752 |
| 1925 ARTHUR Automatic Switch Electric Circuits |
| 1944 STEWART Automatic Control Electric Circuits |
| 1942 PATRICK FOY Electric Circuits Patent Print |
| 1947 LITTLE Mechanism Controlling Electric Circuits |
| 1922 AUTOMATIC ELECTRIC CO Telephone Trunk Circuits |
| 1925 EDNA TURNER Automatic Switch Electric Circuits |
| 1958 TUTTLE Control Electric Heating Circuits |
| 1939 DONALD Control Mechanism Electric Circuits |
| 1948 DEANE Pneumatic Timing Switch Electric Circuits |
| 1934 LITTLE Mechanism Controlling Electric Circuits |
| 1944 OHMER Automatic Control Electric Circuits |
| 1958 FERRO CORP Control Electric Heating Circuits |
| 1926 KENNEDY Switch For Electric Circuits Patent |
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