Communications: directive radio wave systems and devices (e.g. – Radio wave absorber
Reexamination Certificate
2007-07-03
2007-07-03
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Radio wave absorber
C342S004000, C174S394000, C361S816000, C977S932000
Reexamination Certificate
active
10913494
ABSTRACT:
The purpose of the present invention is to provide an easy-to-manufacture electromagnetic wave absorption material usable from submillimeter wave region to millimeter wave region with an excellent radio wave absorbing performance and a variety of usage thereof.The present invention is characterized by an electromagnetic wave absorption material comprised of a dispersions of at least one of the materials: a multi-layer hollow globule of carbon, a schungite carbon, and the schungite ore; mixed into a matter having a high electrical resistivity. The invention is further characterized by an electronic device, an optical transmission module, an optical reception module, a high frequency telecommunication equipment, and a stop-free automated tollgate system, wherein at least a part of their board, electronic element, and circuit wiring are covered with said electromagnetic wave absorption material.
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Fujieda Tadashi
Hayashibara Mitsuo
Hidaka Kishio
Ikeda Shinzou
Taguchi Noriyuki
Dickstein , Shapiro, LLP.
Gregory Bernarr E.
Hitachi , Ltd.
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