| 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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| 05/21/1991 | US5016419 Brick placing machine |
| 05/21/1991 | US5016319 Handle assembly |
| 05/19/1991 | WO1991007255A1 Braiding pincers |
| 05/19/1991 | CA2068988A1 Steel-fixing pincers |
| 05/16/1991 | DE3937275A1 Support for concrete reinforcing rods - consists of sheet metal box with lid of impregnated wood fibres |
| 05/15/1991 | EP0427673A1 Conveyor device, in particular for conveying concrete and/or bulk material |
| 05/15/1991 | EP0426709A1 A process and device for distributing pumpable viscous materials among several lines. |
| 05/15/1991 | CN2077008U Inherent stress drawing die machine |
| 05/15/1991 | CN1051408A Method of forming dense concrete surface layer |
| 05/14/1991 | US5014473 Apparatus and method for lifting tilt-up wall constructions |
| 05/08/1991 | EP0425756A1 Method of forming dense concrete surface layer |
| 05/08/1991 | EP0229776B1 An automatic apparatus for strapping elongated superposed bodies |
| 05/08/1991 | CN1051223A Method and tools for shortening furnace masonry period |
| 05/07/1991 | US5012879 Self-propelled jacking apparatus for factory constructed buildings |
| 05/07/1991 | US5012590 Disposable layout tape |
| 05/02/1991 | EP0424591A1 Quick telescopic, extensible, movable belt conveyor with three rotational degrees of freedom for solid or viscoplastic materials, particularly for use in cement mixer or truck mixer |
| 05/02/1991 | EP0424417A1 A stanchion assembly |
| 05/02/1991 | EP0074971B2 Method for mounting a roof, floor or similar structure and a structure adapted to be mounted according to the method |
| 05/02/1991 | DE4033492A1 Appliance to facilitate construction of small buildings - has platform of adjustable height, mounted on wheeled chassis |
| 04/30/1991 | US5011724 Self-adhesive cover film |
| 04/30/1991 | US5011106 Roof safety anchor |
| 04/30/1991 | US5010704 Glass block construction assembly |
| 04/23/1991 | US5009048 Glass block walls using acrylic or glass filters |
| 04/23/1991 | US5009015 Brick line tool |
| 04/17/1991 | EP0422745A1 Concrete-pumping device |
| 04/17/1991 | CN2075230U Equipment for hydraulic pushing and constructional wort equipment of great span building construction |
| 04/14/1991 | WO1991005923A1 Building wall constrcution |
| 04/14/1991 | CA2067238A1 Building wall construction |
| 04/10/1991 | EP0421862A1 Methods and means for tensioning multiple strand cables |
| 04/09/1991 | US5005799 Patterns for determining the profile of an arch |
| 04/07/1991 | WO1991005118A1 Method for erecting buildings, and structural assembly for carrying out the method |
| 04/07/1991 | CA2066683A1 Method for erecting buildings, and structural assembly for carrying out the method |
| 04/03/1991 | EP0282516B1 Process for protecting surfaces of natural and artificial stone from colour applications |
| 04/03/1991 | CN2074335U Multi-functional vertical |
| 04/03/1991 | CN2074334U Multi-purpose adjusting tool for constructional work |
| 04/03/1991 | CN1050423A Multipurpose machine for archtiecture |
| 04/02/1991 | US5004020 Wire twisting apparatus |
| 04/02/1991 | US5003701 Masonry clip |
| 03/27/1991 | EP0419250A2 A construction landing platform for installation in a building under construction |
| 03/27/1991 | EP0418231A1 A stove as well as a method and a device for manufacturing and mounting fire-places |
| 03/27/1991 | EP0284609B1 Carrier-like structural element |
| 03/27/1991 | CN2073912U Maintenance machine for scaffold clasp |
| 03/26/1991 | US5002152 Fall restraint cable support and method |
| 03/26/1991 | US5001839 Building profiling tools |
| 03/21/1991 | WO1991003613A1 Mason's scale and masonry guide employing said scale |
| 03/21/1991 | CA2025886A1 Landing platform and overhead protector for a construction site |
| 03/20/1991 | EP0417355A1 Fall guard for a roof |
| 03/20/1991 | CN2073450U Adjusting means for assembly of construction member |
| 03/19/1991 | US4999959 Prestressed construction element of composite structure and method for element fabrication |
| 03/13/1991 | EP0416690A2 Mason's adjusting profile |
| 03/12/1991 | CA1281200C Concrete floor finishing machine |
| 03/07/1991 | DE3929189A1 Grip tongs for lifting pieces such as sand-lime bricks - has two single armed levers linked on horizontal pivot axle, with grip handles |
| 03/06/1991 | EP0108104B1 Arrangement in a tiltable form for casting |
| 03/06/1991 | CN2072565U Building fitting lifting basket safety box |
| 03/06/1991 | CN2072564U Bonding machine |
| 03/06/1991 | CN2072563U Building oscillating guide with adsorped device |
| 03/06/1991 | CN1011901B Method and equipment for laying residential building |
| 03/05/1991 | US4997172 Joist positioning tool |
| 03/05/1991 | US4996973 Stove as well as a method and a device for manufacturing and mounting fire-places |
| 02/27/1991 | EP0414611A1 Method and arrangement for positioning jacks for prestressing cables in auctures |
| 02/27/1991 | EP0413928A1 Distributing system with a concrete-distributing mast |
| 02/27/1991 | EP0293451B1 A fastening means for fastening a protective sheet material to a scaffold or a similar frame structure |
| 02/27/1991 | CN2072115U Rotor type concrete gun |
| 02/26/1991 | US4995167 Masonry guide |
| 02/20/1991 | EP0413381A1 Method and device for arranging building panels |
| 02/19/1991 | US4993884 Method and spraying apparatus for applying a layer of air-sprayed concrete |
| 02/14/1991 | DE4023629A1 Pot for holding cement or concrete for forming floor - is supplied by pipe connected to pot by swivelling joint |
| 02/14/1991 | DE3925368A1 Tension application to prestressing cables of concrete structure - using conical wedges to apply and maintain initial partial tension |
| 02/13/1991 | EP0412078A1 Brick laying tools |
| 02/13/1991 | CN2071228U Test stick clamp |
| 02/07/1991 | WO1991001480A1 Adhesive template tape |
| 02/07/1991 | WO1991001423A1 Lifting cramp, mainly for raising concrete slabs |
| 02/07/1991 | DE3925547A1 Erecting permanent building structure - by use of temporary support structure which is subsequently removed |
| 02/06/1991 | EP0412042A1 Installation for carrying out metallic reinforcements |
| 02/06/1991 | CN2070786U Prestressing steel wire tension machine |
| 02/05/1991 | US4990082 Vibrator with suction apparatus |
| 02/05/1991 | US4989689 Yard guard |
| 01/30/1991 | EP0410079A1 Connecting casing for linked concrete slabs |
| 01/30/1991 | CN2070334U Protector for squatting type defecate device |
| 01/30/1991 | CN2070333U Rotational flow flexible discharge pipe |
| 01/23/1991 | EP0409357A1 Method and device for height-adjustable arranging of masonry materials |
| 01/23/1991 | EP0408645A1 Clamp for building structures |
| 01/22/1991 | US4986389 Slidable safety net assembly |
| 01/22/1991 | US4986043 Device for erecting and plumbing a wall frame unit |
| 01/20/1991 | CA2019668A1 Adhesive template tape |
| 01/16/1991 | EP0223859B1 Concrete floor finishing machine |
| 01/16/1991 | CN2069449U 安全网扣件 Safety net fasteners |
| 01/16/1991 | CN1048576A Hydraulic stretcher for single steel of sleeper |
| 01/15/1991 | US4984401 Device and method for housing a steel reinforcement in an area where joints are made between first and subsequently poured concrete structures |
| 01/10/1991 | WO1991000403A1 Batching box |
| 01/09/1991 | CN2068989U Asymmetrical shovel |
| 01/08/1991 | WO1991000801A1 An apparatus for securing fittings in a thermoplastic foil web |
| 01/08/1991 | US4982987 Masonry block tool |
| 01/08/1991 | US4982813 Shock absorbing safety net |
| 01/08/1991 | CA2063733A1 Apparatus for securing fittings in a thermoplastic foil web |
| 01/02/1991 | EP0404802A1 Variable set-up, reusable centering frame for use as movable and stationary equipment. |
| 01/02/1991 | CN2068541U Track rail concrete mixing lorry |
| 01/01/1991 | US4981626 Method of forming dense concrete surface layer |
| 12/25/1990 | US4979725 Roof safety barrier supporting frame |
| 12/25/1990 | US4979604 Concrete distribution device |