Electricity: circuit makers and breakers – Electric switch details – Indicators
Reexamination Certificate
2006-06-06
2006-06-06
Lee, K. (Department: 2832)
Electricity: circuit makers and breakers
Electric switch details
Indicators
C200S0050EA, C362S085000, C341S022000
Reexamination Certificate
active
07057125
ABSTRACT:
A backlighting keyboard includes a light guide board with multiple fastening members formed at an upper surface, multiple light refracting areas formed at a bottom surface, multiple openings defined through the light guide board, and multiple illuminants respectively received in the openings. A membrane printed circuit board on the light guide board has multiple nodes respectively aligned with the fastening members, and multiple first holes defined through the membrane printed circuit board. A rubber button sheet on the membrane printed circuit board has multiple buttons respectively aligned with the nodes, and multiple second holes defined through the rubber button sheet. Multiple bridges are respectively and pivotally mounted on the fastening members of the light guide board. Multiple keys are respectively and pivotally mounted on the bridges.
REFERENCES:
patent: 4387127 (1983-06-01), Ogden
patent: 4772769 (1988-09-01), Shumate
patent: 5063484 (1991-11-01), Tanaka
patent: 5936554 (1999-08-01), Stanek
patent: 6548779 (2003-04-01), Takahashi et al.
patent: 6575586 (2003-06-01), Tsau
Kamrath Alan D.
Lee K.
Nikolai & Mersereau , P.A.
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