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Class Information
Number: 405/125
Name: Hydraulic and earth engineering > Fluid control, treatment, or containment > Flow control > Culvert > Terminal or head
Description: Method or apparatus including specific structure at the culvert inlet or outlet.










Patents under this class:

Patent Number Title Of Patent Date Issued
8496405 Mitred grate and drain cover Jul. 30, 2013
8465226 Culvert end Jun. 18, 2013
8215869 Reinforced soil arch Jul. 10, 2012
7798747 Stormwater capture module Sep. 21, 2010
7695216 Mitred grate and drain cover Apr. 13, 2010
7682104 Culvert inlet protection device Mar. 23, 2010
7530764 Easy clean culvert system May. 12, 2009
7441989 Beaver control device for a culvert pipe Oct. 28, 2008
7305798 Composite overfilled arch system Dec. 11, 2007
7252458 Mitred grate and drain cover Aug. 7, 2007
7217064 Reinforcement of arch type structure with beveled/skewed ends May. 15, 2007
7080956 Open bottom box culvert Jul. 25, 2006
7052210 Inlet collar for highway culverts May. 30, 2006
7052209 Corrugated stormwater chamber May. 30, 2006
6942425 Mitred grate and drain cover Sep. 13, 2005
6922950 Top arch overfilled system Aug. 2, 2005
6860238 Culvert shelves to assist animal migration Mar. 1, 2005
6769662 Form and method for casting a monolithic precast safety end Aug. 3, 2004
6736570 Precast safety end and form therefor May. 18, 2004
6644889 Headwall for drain pipe Nov. 11, 2003
6595721 Mitred grate and drain cover Jul. 22, 2003
6533498 Reinforced composite material Mar. 18, 2003
6447206 Beaver control screen for culvert pipe Sep. 10, 2002
6434892 Overfilled, precast skewed arch bridge Aug. 20, 2002
6422788 Headwall for drain pipe Jul. 23, 2002
6413015 Beaver controlling culvert attachment Jul. 2, 2002
6394700 Highway underdrain plastic apron endwall with anti-floatation wings May. 28, 2002
6338595 Storm water control header for culverts Jan. 15, 2002
6203245 Culvert end guard Mar. 20, 2001
6161342 Prefabricated concrete element for building a civil engineering structure having an arched wall Dec. 19, 2000
5971663 Culvert collar Oct. 26, 1999
5836717 Multi-segment spandrel wall for overfilled arch structures Nov. 17, 1998
5720577 Box culvert Feb. 24, 1998
5536113 Precast concrete wingwall Jul. 16, 1996
5425600 Drainage block feedthrough for assembly of walls constructed of specialized retaining blocks Jun. 20, 1995
4993872 Precast concrete culvert system Feb. 19, 1991
4797030 Precast concrete culvert system Jan. 10, 1989
4723871 Inexpensive headwall for culverts Feb. 9, 1988
4713179 Removable culvert grate Dec. 15, 1987
4687371 Precast concrete culvert section Aug. 18, 1987
4595314 Precast concrete culvert section Jun. 17, 1986
4564313 Rectilinear culvert structure Jan. 14, 1986
4537529 Earth retaining end element for use with overfilled load support structures Aug. 27, 1985
4103495 Flow control device for an irrigation ditch Aug. 1, 1978











 
 
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