| Patents for E04G 21 - Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work (22,137) |
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| 07/31/1984 | US4462719 Concrete gun |
| 07/31/1984 | US4462573 Support post for temporary guard-rail chains |
| 07/31/1984 | US4462548 Injector, in particular for injecting concrete |
| 07/24/1984 | US4461461 Non-corrosive security railing |
| 07/19/1984 | WO1984002735A1 Bricklaying profiles |
| 07/03/1984 | US4457080 Flexible gage clamp apparatus for supporting a flexible gage line |
| 06/21/1984 | WO1984002369A1 Prefabricated concrete reinforcing element and a cassette for use in this element |
| 06/19/1984 | US4454633 Apparatus for releasing pre-stress cable gripping means when said cable is being detensioned |
| 06/13/1984 | EP0110542A1 Concrete strengthening members, particularly prestressing tendons, having improved corrosion resistance and/or bonding characteristics, and methods relating thereto |
| 05/29/1984 | US4450666 Econo bricking ring |
| 05/23/1984 | EP0108755A1 Method for mounting skeletons of superstructures and jig for implementing such method. |
| 05/22/1984 | US4449845 Screed board apparatus |
| 05/17/1984 | EP0100333A4 Adjustable brace or prop. |
| 05/16/1984 | EP0108104A1 Arrangement in a tiltable form for casting. |
| 05/15/1984 | US4448225 Tool to supply, twist and cut ends of a metal wire or plastic filament to provide a fastener |
| 05/01/1984 | US4445303 Wedge-type concrete insert |
| 04/24/1984 | US4443994 Bricklayer apparatus |
| 04/24/1984 | US4443980 Pulling iron enclosure |
| 04/24/1984 | US4443954 Masonry guide |
| 04/10/1984 | US4441685 Column form |
| 04/10/1984 | CA1165133A1 Post-tensioned concrete slab and a method of forming same |
| 04/03/1984 | US4440499 Method and apparatus of blowing mortar or the like |
| 04/03/1984 | US4439961 Leveling and locating device and method of using |
| 03/21/1984 | EP0103060A1 Reinforcement-iron holder for use in joining cast concrete work and method of manufacturing the same |
| 03/20/1984 | US4437828 Screed bar assembly |
| 03/20/1984 | US4437646 Discharge valve for concrete pumping apparatus |
| 03/20/1984 | US4437642 Lift system for tilt-up walls |
| 03/20/1984 | US4437276 Method and device for the performance of a supporting function in a passage |
| 03/14/1984 | EP0102862A1 Bricklayer's scaffold with a lifting threstle for conveyers |
| 03/07/1984 | EP0101802A1 Apparatus for delivering viscous materials, particularly concrete |
| 02/22/1984 | EP0101268A2 Jack for prestressed concrete structure |
| 02/21/1984 | US4432676 Vehicular mobile high capacity pneumatic conveyor |
| 02/21/1984 | US4432578 Closed pressure actuated system for placement bucket |
| 02/21/1984 | US4432175 Post-tensioned concrete slab |
| 02/15/1984 | EP0100333A1 Adjustable brace or prop |
| 02/14/1984 | US4431336 Concrete prefinishing tool |
| 02/14/1984 | CA1162073A1 Jack for tensioning cables in prestressed concrete structures |
| 02/07/1984 | US4429849 Frame for setting up the lines preparatory to erection of buildings or the like |
| 02/02/1984 | WO1984000288A1 A method and a device for stiffening structures diagonally |
| 02/01/1984 | EP0099579A2 Process for tying crossing elements |
| 01/31/1984 | US4428678 Concrete vibrator |
| 01/25/1984 | EP0099345A1 A method and a device for stiffening structures diagonally |
| 01/25/1984 | EP0099273A1 Vibrator driven by compressed air with variable air injection in relation to the vane position |
| 01/25/1984 | EP0098845A1 An apparatus for spraying concrete |
| 01/24/1984 | US4427358 Sectional concrete screed machine |
| 01/24/1984 | US4427181 Device for lifting loads, especially heavy loads, in a stepwise manner by means of one or several jacks |
| 01/24/1984 | US4427180 Linear hydraulic winch comprising a pair of self-clamping jaws clamping alternately the axial cable |
| 01/18/1984 | EP0054026B1 Lost formwork for use when casting concrete floors |
| 01/05/1984 | WO1984000044A1 A floor laying arrangement |
| 01/04/1984 | EP0097569A1 Device for producing grids for reinforced concrete |
| 01/04/1984 | EP0097195A1 Prefabricated concrete reinforcement element and method for making reinforcement joints |
| 01/03/1984 | US4423796 Ladder climber's safety device |
| 01/03/1984 | US4423694 Pad for setting concrete |
| 12/28/1983 | EP0096736A2 Process for obtaining a frictional connection between concrete and duroplast-laminated and lacquered objects |
| 12/21/1983 | EP0096036A1 Arrangement for the production of longitudinal screed slabs consisting of concrete. |
| 12/20/1983 | US4420921 Building spacer |
| 12/13/1983 | US4419852 Device for preserving connecting bars for concrete structural members |
| 12/07/1983 | EP0038800B1 Skeleton-frame system for the erection of building constructions |
| 12/06/1983 | US4418713 Concrete pump tractor trailer assembly |
| 11/29/1983 | US4417425 Apparatus for erecting concrete wall panels |
| 11/29/1983 | CA1157679A1 Recoverable form part for use in the region where a tendon is anchored in a prestressed concrete component |
| 11/24/1983 | WO1983004066A1 Arrangement in a tiltable form for casting |
| 11/23/1983 | EP0094761A1 Apparatus for providing a reference |
| 11/23/1983 | EP0094404A1 Anchoring device for works effected on a concrete wall or ceiling |
| 11/09/1983 | EP0093473A2 Process and apparatus for the preparation of mortars |
| 11/01/1983 | US4412803 Adjustable support bracket for concrete finishing equipment |
| 11/01/1983 | US4412407 Mounting arrangement for guard rail post |
| 10/18/1983 | US4410162 Recoverable form part for use in the region where a tendon is anchored in a prestressed concrete component |
| 10/11/1983 | US4408978 Advancement apparatus for concrete screed |
| 10/11/1983 | US4408398 Gage for laying blocks |
| 10/04/1983 | US4407770 Cable anchorage |
| 10/04/1983 | US4407392 Safety scaffold for metal melting furnaces |
| 09/21/1983 | EP0088825A2 Transporting anchor for prefabricated concrete elements |
| 09/20/1983 | US4405114 Jack for tensioning cables in prestressed concrete structures |
| 09/20/1983 | US4404782 Suspended modular floor assembly |
| 09/07/1983 | EP0087434A1 Mobile conveyor/elevator |
| 08/23/1983 | US4400108 Mobile reinforced concrete pipe machine |
| 08/23/1983 | US4399583 Hand float |
| 08/18/1983 | WO1983002794A1 Adjustable brace or prop |
| 08/16/1983 | US4398762 Pickup device for lifting concrete body |
| 08/09/1983 | CA1151440A1 Receptacle for reinforcing bars |
| 08/09/1983 | CA1151406A1 Precast house making plant |
| 08/04/1983 | WO1983002634A1 Method for mounting skeletons of superstructures and jig for implementing such method |
| 07/21/1983 | WO1983002475A1 An apparatus for spraying concrete |
| 07/05/1983 | CA1149191A1 Adjustable screed bar apparatus |
| 07/05/1983 | CA1149190A1 Mortar trough |
| 06/23/1983 | WO1983002128A1 Prefabricated concrete reinforcement element and method for making reinforcement joints |
| 06/07/1983 | US4386901 Portable vibrating concrete screed |
| 06/07/1983 | US4386486 Cover for concrete voids of lifting inserts |
| 05/26/1983 | WO1983001805A1 Method and device for tying concrete iron bars |
| 05/26/1983 | WO1983001804A1 Anchoring device for works effected on a concrete wall or ceiling |
| 05/18/1983 | EP0079298A1 Reinforcing bar support for joining concrete structures |
| 05/17/1983 | US4383398 Insulation dispensing cage |
| 04/19/1983 | US4380329 Footing jig for positioning fasteners |
| 04/19/1983 | CA1144774A1 Receptacle for reinforcing bars |
| 04/12/1983 | US4379380 Method of constructing angled brick panels |
| 03/30/1983 | EP0075089A2 Guide fixing device for covering walls |
| 03/30/1983 | EP0075055A1 Improved safety harness restraining fixture |
| 03/30/1983 | EP0074992A1 Method and device for jointing building stones together |
| 03/30/1983 | EP0074971A1 Method for mounting a roof, floor or similar structure and a structure adapted to be mounted according to the method. |