Naan Mechanical Works

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4687143 Drip irrigation apparatusExpiredJan 10, 86Aug 18, 87[A01G]
4655397 Vortex dripperExpiredDec 28, 84Apr 07, 87[B05B, F15D]
4540125 Rotary sprinkler having selectable area coverageExpiredApr 18, 83Sep 10, 85[B05B]
4423838 Selectable separation and capacity irrigation lineExpiredFeb 04, 81Jan 03, 84[A01G]
4402460 Rotary sprinklerExpiredJun 30, 81Sep 06, 83[B05B]

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