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Tesla speedometer

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UNITED STATES PATENT OFFICE. NIKOLA TESLA, OF NEW YORK, N. Y., ASSIGNOR TO WALTHAM WATCH COMPANY, OF WALTHAM, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS. TESLA PATENT 1,274,816 SPEED-INDICATOR. 1...


UNITED STATES PATENT OFFICE. NIKOLA TESLA, OF NEW YORK, N. Y., ASSIGNOR TO WALTHAM WATCH COMPANY, OF WALTHAM, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS. TESLA PATENT 1,209,359 SPEED-INDICATOR. 1...

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