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| 9970166 | Concrete bridge system and related methods | Mar 24, 14 | May 15, 18 | Contech Engineered Solutions LLC |
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| 9828760 | Formwork for use in the construction of arched structures and method of constructing arched structures | Nov 01, 16 | Nov 28, 17 | Lock-Block Ltd. |
| 9822498 | Precast concrete bridge unit and headwall assembly and method of production | Aug 03, 16 | Nov 21, 17 | STRUCTURE SIGHT LLC, DBA PRETEK GROUP |
| 9809938 | Box culvert | Apr 22, 14 | Nov 07, 17 | JENSEN ENTERPRISES, INC. |
| 9803326 | Bridge system adapted for promoting sedimentation | Sep 28, 16 | Oct 31, 17 | CONTECH ENGINEERED SOLUTIONS LLC |
| 9745733 | Drainage channel with a drainage body and a cover | Sep 09, 13 | Aug 29, 17 | ACO SEVERIN AHLMANN GMBH & CO. KG |
| 9481968 | Bridge system and method including four sided concrete bridge units adapted for promoting sedimentation | Jul 01, 14 | Nov 01, 16 | CONTECH ENGINEERED SOLUTIONS LLC |
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| 9228303 | Device for a helicopter deck | Oct 04, 12 | Jan 05, 16 | Marine Aluminum AS |
| 9228312 | Method of building a structure in the presence of water | Aug 21, 12 | Jan 05, 16 | Not available |
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| 9016979 | Plastic stormwater chamber made from separately molded half chambers | Sep 12, 13 | Apr 28, 15 | INFILTRATOR WATER TECHNOLOGIES, LLC, INFILTRATOR SYSTEMS, |