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http://www.google.com.mx/patents/US1986330?utm_source=gb-gplus-share
Patent US1986330 - ELECTRICAL DISCHABGE APPARATUS
ELECTRICAL DISCHABGE APPARATUS
Phllo T. Farnsworth
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Patent number
: 1986330
Filing date
: 17 Apr 1928
Issue date
: 1 Jan 1935
Inventor
:
Phllo T. Farnsworth
Original Assignee
:
by mesne assignments
Current U.S. Classification
:
315/382
;
313/252
;
313/269
;
313/313
;
313/331
;
313/381
;
315/11
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