|
| US4127990 | 21 janv. 1977 | 5 déc. 1978 | | Drainage structure forming method |
| US4275757 | 6 août 1979 | 30 juin 1981 | | Manhole structure and method of making same |
| US4472911 | 9 févr. 1982 | 25 sept. 1984 | Pont-A-Mousson S.A.
Emile Pierre Roche | Construction for access to a buried pipeline |
| US4574454 | 14 janv. 1985 | 11 mars 1986 | Chubb & Son's Lock and Safe Company Limited | Method of constructing fire resistant enclosures |
| US4948296 | 18 déc. 1987 | 14 août 1990 | Huntina Pty. Ltd. | Swimming pool construction |
| US4997602 | 2 oct. 1989 | 5 mars 1991 | Action Products Marketing Corporation | Cast-in-place manhole liner method |
| US5017313 | 27 sept. 1990 | 21 mai 1991 | Action Products Marketing Corporation | Method and means for repairing existing manhole |
| US5106440 | 12 avr. 1991 | 21 avr. 1992 | | Method for repairing manholes or wetwalls |
| US5189861 | 12 nov. 1991 | 2 mars 1993 | | Sewer chimney coupling and method of building a sewer chimney |
| US5263298 | 27 juil. 1992 | 23 nov. 1993 | | Procedure for making in-situ manholes for underground electric and telephone lines ductwork |
| US5271193 | 21 févr. 1992 | 21 déc. 1993 | | Concrete products and methods of fabrication |
| US5293719 | 11 janv. 1993 | 15 mars 1994 | | Sewer chimney coupling |
| US5345728 | 17 mai 1993 | 13 sept. 1994 | | Sewer chimney coupling |
| US5386669 | 15 mars 1993 | 7 févr. 1995 | | Corrosion resistant leakproof plastic manhole system |
| US5398477 | 25 juin 1993 | 21 mars 1995 | Georg Prinzing GmbH & Co. KG Betonformen-und Maschinenfabrik | Shaft elements made from molding material |
| US5482403 | 25 juin 1993 | 9 janv. 1996 | Hail Mary Rubber Company, Inc. | Sewer construction and pipe encasement therefor |
| US5525007 | 14 mars 1995 | 11 juin 1996 | Hail Mary Rubber Co., Inc. | Sewer construction |
| US5879501 | 19 déc. 1996 | 9 mars 1999 | Illinois Tool Works, Inc. | Method of sealing sewer systems |
| US6018914 | 17 déc. 1996 | 1 févr. 2000 | Shonan Gosei-jushi Seisakusho K.K.
Yokoshima & Co. | Liner for manhole and a method for lining a manhole |
| US6263637 | 29 oct. 1999 | 24 juil. 2001 | | Prefabricated emergency shelter |
| US8177028 | 2 déc. 2005 | 15 mai 2012 | Bortana Pty. Ltd. | Ladderway system for underground raises |
