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Books by James Ernest (inventor). Spagnoletti

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ORIGINAL PRINTED PATENT APPLICATION NUMBER 2,733 FOR IMPROVEMENTS IN CIRCUIT INTERRUPTERS TO TAKE THE PLACE OF A FUSE IN ELECTRIC LIGHTING AND POWER INSTALLATIONS. (1909)
🇺🇸 United States
ORIGINAL PRINTED PATENT APPLICATION NUMBER 2,733 FOR IMPROV…
By: James Ernest (inventor). Spagnoletti
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