Assignee
DYCKERHOFF & WIDMANN AG
DE·106 granted patents·2,117 citations·filing 1973–1999
Top patents by PatentIndex Score
106 records- 0196US4363462ARecoverable formwork part for forming the anchoring location of a tendon in a concrete structural componentDYCKERHOFF & WIDMANN AG·Filed 1981·Granted Dec 14, 1982·69 cites·5 claims
- 0289US4922681AHot-rolled concrete reinforcing bar, in particular reinforcing ribbed barDYCKERHOFF & WIDMANN AG·Filed 1988·Granted May 8, 1990·26 cites·20 claims
- 0388US4633540ATension tie memberDYCKERHOFF & WIDMANN AG·Filed 1985·Granted Jan 6, 1987·73 cites·18 claims
- 0485US4908129AImpervious layer formation process and landfill adsorption systemDYCKERHOFF & WIDMANN AG·Filed 1988·Granted Mar 13, 1990·63 cites·17 claims
- 0585US4185440AMethod of and parts used in the construction of a prestressed concrete structureDYCKERHOFF & WIDMANN AG·Filed 1978·Granted Jan 29, 1980·39 cites·15 claims
- 0683US4473936AProcess for manufacturing a protection against corrosion for cables of high-strength steel wiresDYCKERHOFF & WIDMANN AG·Filed 1981·Granted Oct 2, 1984·26 cites·12 claims
- 0781US4630971AApparatus for anchoring rock and the likeDYCKERHOFF & WIDMANN AG·Filed 1986·Granted Dec 23, 1986·59 cites·27 claims
- 0881US4473915ATension member and a method of assembling and installing the tension memberDYCKERHOFF & WIDMANN AG·Filed 1982·Granted Oct 2, 1984·47 cites·7 claims
- 0980US5809710AMethod of tensioning a tension member composed of a plurality of individual elementsDYCKERHOFF & WIDMANN AG·Filed 1996·Granted Sep 22, 1998·61 cites·7 claims
- 1080US4229501ASteel rods, especially reinforcing or tensioning rodsDYCKERHOFF & WIDMANN AG·Filed 1979·Granted Oct 21, 1980·33 cites·5 claims
- 1180US4092814AReinforcing rodDYCKERHOFF & WIDMANN AG·Filed 1975·Granted Jun 6, 1978·26 cites·2 claims
- 1279US4971493AAnchoring device for the rod-shaped tension member of an anchor, especially a rock memberDYCKERHOFF & WIDMANN AG·Filed 1989·Granted Nov 20, 1990·40 cites·15 claims
- 1379US4958961AAnchoring arrangement for a rod-shaped tension member formed of fiber reinforced composite materialDYCKERHOFF & WIDMANN AG·Filed 1989·Granted Sep 25, 1990·33 cites·9 claims
- 1479US4878327ACorrosion protected tension member for use in prestressed concrete and method of installing sameDYCKERHOFF & WIDMANN AG·Filed 1988·Granted Nov 7, 1989·44 cites·41 claims
- 1579US4877463AMethod for producing rolled steel products, particularly threaded steel tension membersDYCKERHOFF & WIDMANN AG·Filed 1988·Granted Oct 31, 1989·19 cites·5 claims
- 1679US4449855AAnchor head for a corrosion-protected injected anchorDYCKERHOFF & WIDMANN AG·Filed 1982·Granted May 22, 1984·36 cites·3 claims
- 1779US4155323AFloat construction for reducing pitching, rolling or dippingDYCKERHOFF & WIDMANN AG·Filed 1977·Granted May 22, 1979·25 cites·7 claims
- 1877US5056284ABundled tensioning member for prestressing a tall structural member and method of installing sameDYCKERHOFF & WIDMANN AG·Filed 1989·Granted Oct 15, 1991·37 cites·11 claims
- 1977US4848052ASpacer for tension memberDYCKERHOFF & WIDMANN AG·Filed 1988·Granted Jul 18, 1989·44 cites·8 claims
- 2077US4343122ASystem for anchoring a tendon in a structural concrete unitDYCKERHOFF & WIDMANN AG·Filed 1981·Granted Aug 10, 1982·40 cites·8 claims
- 2177US4312288AFloating structure for effecting energy transformation from sea waterDYCKERHOFF & WIDMANN AG·Filed 1978·Granted Jan 26, 1982·45 cites·18 claims
- 2276US4366654ADouble-walled tank for low-temperature liquidsDYCKERHOFF & WIDMANN AG·Filed 1980·Granted Jan 4, 1983·34 cites·5 claims
- 2375US4904122AAnchoring device, such as a rock anchorDYCKERHOFF & WIDMANN AG·Filed 1988·Granted Feb 27, 1990·40 cites·6 claims
- 2474US4648146AApparatus for and method of assembling a tension tie memberDYCKERHOFF & WIDMANN AG·Filed 1985·Granted Mar 10, 1987·40 cites·18 claims
- 2574US4469756AMethod of and apparatus for forming an outwardly projecting bulge in a steel wire strand for forming an anchor in concreteDYCKERHOFF & WIDMANN AG·Filed 1983·Granted Sep 4, 1984·28 cites·16 claims
- 2673US5472296ACorrosion protected support element for a soil anchor or a rock anchor, a pressure pile or the likeDYCKERHOFF & WIDMANN AG·Filed 1993·Granted Dec 5, 1995·38 cites·15 claims
- 2773US4275679AFloating platform with monolithically formed float members and platformDYCKERHOFF & WIDMANN AG·Filed 1978·Granted Jun 30, 1981·21 cites·21 claims
- 2873US4140429ACorrosion protected tensioning member for a prestressable anchor in solid rockDYCKERHOFF & WIDMANN AG·Filed 1978·Granted Feb 20, 1979·25 cites·10 claims
- 2973US3985480AApparatus for the sectional cantilever construction of bridge girder systemsDYCKERHOFF & WIDMANN AG·Filed 1975·Granted Oct 12, 1976·29 cites·16 claims
- 3070US4850746ARock anchor assembly for securing roadways and wall surfaces of open cuts and tunnelsDYCKERHOFF & WIDMANN AG·Filed 1988·Granted Jul 25, 1989·40 cites·13 claims
- 3170US4594827ATension member, particularly for use as a diagonal cable in a stayed girder bridgeDYCKERHOFF & WIDMANN AG·Filed 1985·Granted Jun 17, 1986·34 cites·7 claims
- 3270US4137686ASteel rods with hot rolled ribs formed in a partial spiralDYCKERHOFF & WIDMANN AG·Filed 1978·Granted Feb 6, 1979·34 cites·4 claims
- 3368US4426817ADouble-walled tank for low-temperature liquidsDYCKERHOFF & WIDMANN AG·Filed 1980·Granted Jan 24, 1984·25 cites·6 claims
- 3468US4103861AArrangement for the sectional cantilever projection of multi-panel bridge supporting structures of steel or prestressed concreteDYCKERHOFF & WIDMANN AG·Filed 1977·Granted Aug 1, 1978·32 cites·11 claims
- 3568US4048875AApparatus for screwing a threaded nut onto a steel rodDYCKERHOFF & WIDMANN AG·Filed 1976·Granted Sep 20, 1977·14 cites·14 claims
- 3668US4025265AConcrete tie forming systemDYCKERHOFF & WIDMANN AG·Filed 1975·Granted May 24, 1977·15 cites·12 claims
- 3767US4112637ARemovable press anchor with destructible anchor bodyDYCKERHOFF & WIDMANN AG·Filed 1977·Granted Sep 12, 1978·20 cites·6 claims
- 3866US4664555ATension member for a rock anchor or the likeDYCKERHOFF & WIDMANN AG·Filed 1986·Granted May 12, 1987·27 cites·11 claims
- 3966US4388014AMultiple part tapered collar for a tendon anchorage systemDYCKERHOFF & WIDMANN AG·Filed 1981·Granted Jun 14, 1983·21 cites·3 claims
- 4064US4718209AWedge anchorage for a tension member in a prestressed concrete structureDYCKERHOFF & WIDMANN AG·Filed 1985·Granted Jan 12, 1988·35 cites·15 claims
- 4162US4410162ARecoverable form part for use in the region where a tendon is anchored in a prestressed concrete componentDYCKERHOFF & WIDMANN AG·Filed 1981·Granted Oct 18, 1983·19 cites·8 claims
- 4260US4559691ADevice for securing a sleeve on the abutting ends of reinforcing barsDYCKERHOFF & WIDMANN AG·Filed 1984·Granted Dec 24, 1985·17 cites·11 claims
- 4360US3964154ADevice for simultaneously stressing a number of tension elementsDYCKERHOFF & WIDMANN AG·Filed 1975·Granted Jun 22, 1976·12 cites·3 claims
- 4459US4513465AStiffening girder for a stayed cable bridgeDYCKERHOFF & WIDMANN AG·Filed 1982·Granted Apr 30, 1985·21 cites·8 claims
- 4558US4856173AMethod of the formation of slide surfaces on a track for electromagnetically levitated vehiclesDYCKERHOFF & WIDMANN AG·Filed 1988·Granted Aug 15, 1989·20 cites·10 claims
- 4658US4438719AContainer for transporting compressed gas, such as natural gas, and method of constructing the containerDYCKERHOFF & WIDMANN AG·Filed 1982·Granted Mar 27, 1984·15 cites·13 claims
- 4756US3994138ADevice for the discharge of compression material in the production of the compression member of a pull and pressure anchorDYCKERHOFF & WIDMANN AG·Filed 1976·Granted Nov 30, 1976·14 cites·6 claims
- 4856US3975476AMethod for building a cable-stayed girder bridgeDYCKERHOFF & WIDMANN AG·Filed 1975·Granted Aug 17, 1976·16 cites·1 claims
- 4954US4640068AAnchoring and coupling device for tendons in prestressed concreteDYCKERHOFF & WIDMANN AG·Filed 1983·Granted Feb 3, 1987·23 cites·6 claims
- 5052US4228114AMethod for the construction of elongated concrete structures such as bridges and the likeDYCKERHOFF & WIDMANN AG·Filed 1978·Granted Oct 14, 1980·20 cites·4 claims
Showing the top 50 of 106 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when DYCKERHOFF & WIDMANN AG files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →