Blackwelders

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4584826 Tomato harvesterExpiredFeb 29, 84Apr 29, 86[A01D]
4573124 Height control for agricultural machineExpiredJan 09, 84Feb 25, 86[A01D]
4570426 Tomato harvester with improved separation of tomatoes from other picked up materialExpiredAug 01, 84Feb 18, 86[A01D]
4567766 Piezoelectric ultrasonic apparatus and method for determining the distance from a predetermined point to a targetExpiredMar 20, 84Feb 04, 86[G01N]
4569037 Apparatus for determining the distance from a predetermined point to a targetExpiredFeb 23, 83Feb 04, 86[G01S]
4414792 Height control for agricultural machineExpiredMar 30, 82Nov 15, 83[A01D]
D263174 Front dump refuse compactorExpiredDec 26, 79Feb 23, 82[D150]
4290352 Refuse bin lid unitExpiredMay 12, 80Sep 22, 81[B30B]
4271756 Load retraction preventing finger arrayExpiredDec 18, 79Jun 09, 81[B30B]
D258737 Rear dump refuse compactorExpiredJul 21, 78Mar 31, 81[D150]
D258442 Front dump refuse compactorExpiredJul 21, 78Mar 03, 81[D150]

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