Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2007-11-05
2011-10-25
Pham, Toan N (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S539100, C340S636200, C320S108000
Reexamination Certificate
active
08044813
ABSTRACT:
The present invention provides a radio field intensity measurement device having a display portion with improved visibility, in the case of measuring a weak radiowave from a long distance. In the radio field intensity measurement device, a battery is provided as a power source for power supply and the battery is charged by a received radiowave. When a potential of a signal obtained from the received radiowave is higher than an output potential of the battery, the power is stored in the battery. On the other hand, when the potential of the signal obtained from the received radiowave is lower than the output potential of the battery, power produced by the battery is used as power to drive the radio field intensity measurement device. As an element to display the radio field intensity, a thermochromic element or an electrochromic element is used.
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Chinese Office Action (Application No. 200710169455.6) Dated Jan. 26, 2011.
Dembo Hiroki
Miyaguchi Atsushi
Pham Toan N
Robinson Eric J.
Robinson Intellectual Property Law Office P.C.
Semiconductor Energy Laboratory Co,. Ltd.
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