US Patent 6837021 Door for ticket gate
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Patent abstract
A door for a ticket gate is disclosed. The door is composed of a metal plate as a core material and a cushioning material covering the metal plate. The metal plate defines at least one through-hole therein. The cushioning material comprises expanded polyolefin plates, and the metal plate and the expanded polyolefin plates have been integrated together by arranging the polyolefin plates on opposite sides of the metal plate, respectively, and then press molding them together.
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Patent Inventor Names
Kunio Sudo0
Date of Patent
January 4, 2005
0Patent Application Number
102841820
Date Filed
October 31, 2002
0Patent Primary Examiner
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US Patent 6837021 Door for ticket gate
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