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FREQUENCY ETER
1,4 Specification tte Patent. .
NIKOLA TESLA, NEW YORK, ASSIGNOR ALTHAM WATCH COMPANY, OP
W ALTHAM MASSACHUSETTS, CORPORATION MASSACHUSETTS.
T tio its asp tte 55
B Nikola. 137,689.
Application filed December 18, 1916. Serial No. esla, iti- il,
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