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Patent US652230 - ART OF REDUCING ATTENUATION OF ELECTRICAL WAVES AND APPARATUS THEREFOR
ART OF REDUCING ATTENUATION OF ELECTRICAL WAVES AND APPARATUS THEREFOR
MICHAEL I. PTJPIF et al
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Patent number
: 652230
Filing date
: Dec 14, 1899
Issue date
: Jun 19, 1900
Inventors
:
MICHAEL I. PTJPIF
,
MICHAEL I. PTJPIF
Current U.S. Classification
:
379/398
;
178/45
;
246/8
;
336/178
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