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Wen-Tsung Chang

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10/109,697 | U.S. Patent Application

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Filed April 1, 2002

Examiner WEISS JR, JOSEPH

Class 128

Art Group 3743

Patent No. 6,742,518

Case Type Utility

Status Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362

Last Updated: 3 days, 11 hours ago

Date	#	Transaction
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10/109,697 | U.S. Patent Application

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