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| US3938288 | 5 mars 1974 | 17 févr. 1976 | Regie Nationale des Usines Renault
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| US3948010 | 18 nov. 1974 | 6 avr. 1976 | | Reinforcing device for an element of prestressed concrete |
| US4003450 | 23 avr. 1975 | 18 janv. 1977 | Kenngott GmbH & Co. KG | Small structural building component |
| US4151244 | 1 juin 1976 | 24 avr. 1979 | | Method of manufacturing pre-cast concrete panels |
| US4615163 | 4 oct. 1984 | 7 oct. 1986 | | Reinforced lumber |
| US4852690 | 5 déc. 1988 | 1 août 1989 | Simon Ladder Towers, Inc. | Aerial ladder tower with pretensioned truss members |
| US4905793 | 26 sept. 1989 | 6 mars 1990 | | Ladder bracket |
| US5768847 | 15 mai 1995 | 23 juin 1998 | | Concrete reinforcing devices, concrete reinforced structures, and method of and apparatus for producing such devices and structures |
| US5846364 | 31 mars 1997 | 8 déc. 1998 | | Reinforced concrete structure, reinforcing device, and method for producing same |
