| 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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| 03/07/1989 | CA1250758A1 Wedge anchoring system for the tensioning end of an individual prestressing element for a prestressed concrete component |
| 03/01/1989 | EP0304518A1 Improvements to scaffolding |
| 03/01/1989 | CN2033422U Line checker for bricklayer |
| 03/01/1989 | CN2033421U Amplitude and frequency controlable vibrator |
| 03/01/1989 | CN2033420U Portable vibratory mud spade with a storage bottle for bricklayer |
| 03/01/1989 | CN2033419U Multi-group of building material appliance |
| 03/01/1989 | CN2033418U Automatic bucket loader |
| 02/23/1989 | WO1989001560A1 Device for supporting a frame |
| 02/23/1989 | WO1989001555A1 Brick placing machine |
| 02/22/1989 | CN2033037U Paving device for building-block |
| 02/22/1989 | CN2033036U Concrete plate type electromagnetic oscillating guide |
| 02/21/1989 | US4805877 Tendon stressing jack and method |
| 02/21/1989 | US4805537 Vehicle and joist monorail trackway and method of transporting roof decking thereover |
| 02/15/1989 | EP0303451A1 Building cladding system |
| 02/14/1989 | US4804563 Mixing silica dust into compressed air before entraining concrete; faster setting |
| 02/09/1989 | DE3724861A1 Concrete spraying (gunning) machine with self-regulating adaptation to the concrete composition |
| 02/08/1989 | EP0302649A2 Coating material for tendon for prestressed concrete, and method of making prestressed concrete articles |
| 02/07/1989 | US4802813 Apparatus to be used in conjunction with a forklift for lifting and moving a concrete slab |
| 01/31/1989 | US4801103 By wrapping tensioned wire around the periphery |
| 01/24/1989 | US4799872 Slipform apparatus for emplacing horizontal arcuate re-inforcing rods |
| 01/19/1989 | DE3722244A1 Apparatus for producing walls from masonrywork |
| 01/17/1989 | US4798510 Concrete bucket assembly rigidly mounted for vertical tilting and rotational movement to a forklift vehicle |
| 01/17/1989 | US4798231 Method and device for connecting at least two rods |
| 01/12/1989 | DE3720801A1 Device for clamping frameless structural sheets in window frames |
| 01/10/1989 | US4796851 Reinforcing rod holder for use in joining cast concrete work |
| 01/09/1989 | US4892438 Screed construction and method |
| 01/04/1989 | CN2030229U Prestressed concrete member wire tension gear |
| 01/03/1989 | US4795141 Cam locked stud nailing fixture |
| 01/03/1989 | CA1247882A1 User-mounted concrete screed |
| 12/29/1988 | WO1988010401A1 A stove as well as a method and a device for manufacturing and mounting fire-places |
| 12/29/1988 | WO1988009419A3 Device for tensioning alignment ropes particularly for the building industry |
| 12/21/1988 | CN87214286U Self-relocation horizontal concrete vibrator |
| 12/20/1988 | US4791969 Ceiling hanging device |
| 12/15/1988 | WO1988009853A1 Method and apparatus for forming a path for a screeding means |
| 12/15/1988 | DE3717136A1 Laying unit, in particular laying unit for blocks |
| 12/15/1988 | DE3717040A1 Connection sleeve for injection hoses |
| 12/14/1988 | EP0295224A2 Electrically operated pliers, particularly designed for twisting and cutting iron wire lengths and the like |
| 12/14/1988 | CN87216752U 振捣器 Vibrators |
| 12/07/1988 | EP0293451A1 A fastening means for fastening a protective sheet material to a scaffold or a similar frame structure. |
| 12/06/1988 | US4789267 Method of and apparatus for concrete tunnel lining |
| 12/06/1988 | CA1245948A1 Reinforcing bar binding device |
| 12/01/1988 | WO1988009419A2 Device for tensioning alignment ropes particularly for the building industry |
| 11/30/1988 | CN88212316U Half-wet concrete injector |
| 11/29/1988 | US4787475 Safety fence assembly for use in a building under construction |
| 11/23/1988 | EP0292453A2 Shotcrete gun |
| 11/23/1988 | CN88212251U Thread coil for wall bonding |
| 11/23/1988 | CN87103180A Job technique of jack inverted perfusion steel pipe concrete |
| 11/22/1988 | US4786341 Method for manufacturing concrete structure |
| 11/22/1988 | CA1245038A1 Casting prestressed concrete without embedded reinforcement |
| 11/17/1988 | WO1988008907A1 Prestressed construction element of composite structure and method for element fabrication |
| 11/17/1988 | WO1988008903A1 Method and device for the construction of buildings by raised slabs |
| 11/17/1988 | EP0291132A1 Auxiliary tool for carefully levelling finishing floors |
| 11/16/1988 | CN88102700A Prestressed construction element of composite structure and method for element fabrication |
| 11/10/1988 | DE3713333A1 Gripping device for transporting building materials, such as roofing tiles and the like |
| 11/09/1988 | EP0290422A1 Process for prestressing by creating a reverse field of stress kept up by the fixation of additional materials |
| 11/09/1988 | EP0290107A1 Hoist system for hinged structural members and a hinge and hoisting element therefor |
| 11/09/1988 | EP0289783A2 Application system for installing a flue gas pipe system in a chimney |
| 11/09/1988 | EP0289721A2 Method and device for continuously proportioning powdered materials using a gas under pressure |
| 11/09/1988 | EP0289720A2 Method for applying a layer of spray concrete |
| 11/09/1988 | CN88203910U Special tool for applying mortar to small-size hollow blocks |
| 11/08/1988 | US4782915 Method and apparatus for suspending cladding from scaffolding |
| 11/03/1988 | DE3712847A1 Process and apparatus for the mechanical construction of masonry walls from blocks |
| 11/02/1988 | EP0289261A2 Concrete screed rails |
| 11/02/1988 | EP0288531A1 Trowel for the application and working of building materials. |
| 10/26/1988 | EP0288100A1 Support for the handrail of a detachable handrail unit |
| 10/25/1988 | US4780048 Crane bucket coupling |
| 10/19/1988 | EP0287047A2 Anchor for transporting building elements |
| 10/19/1988 | CN88202377U Changable type stretch board |
| 10/18/1988 | CA1243199A1 Apparatus for removing internal tiles from chimneys |
| 10/12/1988 | EP0185023B1 Vehicle-mounted extensible conveyor |
| 10/11/1988 | US4776159 Automatic spindle |
| 10/11/1988 | US4776145 Multi purpose dome structure and the construction thereof |
| 10/06/1988 | DE3810256A1 Expansion-joint shuttering |
| 10/06/1988 | DE3710073A1 Masonry-wall guide |
| 10/05/1988 | EP0284830A2 Spraying and mixing nozzle assembly |
| 10/05/1988 | EP0284609A1 Carrier-like structural element. |
| 10/05/1988 | CN87215208U Conveying apparatus for shot-like particle |
| 10/04/1988 | US4775306 Concrete floor finishing machine |
| 09/28/1988 | CN87214701U Vibrating rod |
| 09/21/1988 | EP0283225A2 Apparatus for mixing, transporting and placing concrete |
| 09/21/1988 | CN87209421U Tension apparatus |
| 09/13/1988 | US4769960 Coupler for hanging precast concrete panels from a hoist |
| 09/07/1988 | EP0281545A2 Anchor for transporting and manipulating heavy loads |
| 09/06/1988 | US4768752 Driving apparatus operating in successive steps |
| 09/06/1988 | US4768320 Door frame guard |
| 08/31/1988 | EP0280133A2 Method for making foundation layers for masonry, and setting-up profile for this purpose |
| 08/31/1988 | CN87205111U Concrete bunker |
| 08/30/1988 | US4766635 Interior edge-edger |
| 08/30/1988 | US4766634 Hand tool for forming corners of a cementious material |
| 08/25/1988 | WO1988006217A1 Apparatus for repeated marking at regular intervals |
| 08/24/1988 | EP0279145A1 Scissors for cutting tubular webbings |
| 08/23/1988 | US4765116 Brick mason's spacer and method of using the spacer |
| 08/23/1988 | CA1240834A1 Arrangement in plant equipment for supplying a binding agent directly to a building element |
| 08/18/1988 | DE3703609A1 Suspension apparatus for hoisting hollow blocks |
| 08/17/1988 | EP0278364A2 Device for covering door or window openings in buildings |
| 08/17/1988 | EP0278172A1 Anchoring |
| 08/11/1988 | DE3700787A1 Grippers for laying masonry blocks in rows |
| 08/09/1988 | US4762154 Automatic apparatus for strapping elongated superposed bodies |
| 07/27/1988 | CN87206270U Self-winding thread hammer |
| 07/26/1988 | US4759663 Method of placing concrete into a steel encasement |