Communications: electrical – Continuously variable indicating – With meter reading
Patent
1992-11-04
1995-10-24
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
34082549, 34082572, H04Q 700
Patent
active
054613710
ABSTRACT:
An exhibit explaining system includes transmitters and a portable information playback device. The transmitters transmits, in a wireless manner, identification signals respectively assigned to exhibits individually arranged at predetermined spatial intervals. The identification signal may be transmitted using infrared light or radio waves. When receiving the identification signal, the playback device reproduces and outputs prestored explanatory information as specified by the identification signal.
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"Help Wanted", Sound and Communications, Jul. 1980, pp. 16, 20, 21, Leon.
Matsumoto Kanya
Yamauchi Keiichi
Holloway III Edwin C.
Pioneer Electronic Corporation
Powell, Jr. Raymond H. J.
Turner Richard C.
Yusko Donald J.
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