HI-TECH ENGINEERING, INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6755297 Symbol printerExpiredJul 02, 02Jun 29, 04[B65G, B27H]
4573343 Valve leak detectorExpiredApr 30, 84Mar 04, 86[G01M]
4536134 Piston seal access apparatusExpiredApr 30, 84Aug 20, 85[F04B]

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