Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hisataka Mukai0
Tatusya Muraoka0
Date of Patent
January 20, 2009
0Patent Application Number
116417370
Date Filed
December 20, 2006
0Patent Primary Examiner
Patent abstract
A stored light intensity measurement device capable of measuring an afterglow intensity from a light storing sign in a simple way, even if the light storing sign is provided on walls or risers of stairs in facilities or underground shopping mall. The stored light intensity measurement device comprising the light measuring unit configured o measure afterglow from a part of a light storing section on a light storing sign, and calculation means for calculating an afterglow intensity from the light storing sign based on the measured results.
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