Color-coded ruler for three-phase wiring
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United States of America Patent
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-
Oct 20, 1987
Grant Date -
N/A
app pub date -
Feb 12, 1986
filing date -
Feb 12, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electrician's color-coded ruler including sequentially numbered numerals each colored in one of three desired colors corresponding in a repeating pattern to the sequentially numbered poles of a three-phase panelboard.
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International Classification(s)
Cited Art Landscape
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