Illuminated ruler

Details Illuminated ruler Illuminated ruler

2006-11-14

2006-11-14

Bennett, G. Bradley (Department: 2859)

Geometrical instruments

Straightedge type

Rules

C362S577000

Reexamination Certificate

active

07134214

ABSTRACT:
An illuminated ruler including a light transmissive bar having opposed ends. An opaque film bearing printed indicia in the form of ruled markings is affixed to the bottom of the light transmissive bar. A light-emitting diode is embedded within the light transmissive bar for illuminating the ruled markings. A battery is carried atop one end of the bar and is connected to the light-emitting diode for energizing and illuminating the light-emitting diode.

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patent: D448687 (2001-10-01), Landwerlen
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patent: 2004/0130879 (2004-07-01), Choi et al.
patent: 2004/0179372 (2004-09-01), Guerrieri
patent: 2005/0178013 (2005-08-01), Schafer et al.
patent: 2005/0276064 (2005-12-01), Wu et al

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