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IRRIGATION AND DRAINAGE BASED ON HYDRODYNAMIC UNSATURATED FLUID FLOW

10/822,969 | U.S. Patent Application

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Location ELECTRONIC
Filed April 13, 2004
Examiner GERALD A MICHALSKY
Class 137
Art Group 3753
Patent No. 6,918,404
Case Type Utility - 137/132000
Status Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362
Parent 10/82,370 Patented
Parent 60/307,800 Expired
Last Updated: 4 years, 5 months ago
Date # Transaction