| 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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| 05/13/1980 | US4202378 Rebar safety cap |
| 05/13/1980 | CA1077293A1 Tool for bricklaying |
| 04/22/1980 | US4199264 Unbalanced weight vibrator |
| 04/22/1980 | US4198797 Method and fixture for lateral and longitudinal positioning of mobile or modular home units |
| 04/16/1980 | EP0009660A1 Method and device for spraying concrete |
| 04/16/1980 | EP0009607A1 Closure for a pre-stress channel of a pre-stressed concrete element |
| 04/01/1980 | US4195809 Screed bar support stake and method |
| 04/01/1980 | CA1074590A1 Automatic method and apparatus for laying block units |
| 03/18/1980 | US4193750 Self-propelled slip form machine |
| 03/11/1980 | CA1073236A1 Apparatus for erecting concrete wall panels |
| 03/04/1980 | US4191360 Concrete reinforcement mesh lifting tool |
| 03/04/1980 | US4191093 Concrete strike-off vibrator |
| 03/04/1980 | CA1072767A2 Automatic building block laying panel-forming machine |
| 02/05/1980 | CA1071062A1 Device for stress winding long products such as wires or bands around a cylindrical body_______________________________________________________ |
| 01/29/1980 | US4185440 Method of and parts used in the construction of a prestressed concrete structure |
| 01/15/1980 | US4184002 Undulated metallic elements for the reinforcement of composite materials |
| 01/08/1980 | US4182018 Method of and apparatus for the stressing of pressure vessels |
| 01/01/1980 | CA1068998A Fail safe fluid power device |
| 12/25/1979 | US4180170 Rotary tower crane for construction purposes with a distributor device for concrete |
| 12/18/1979 | US4179151 Anchor insert for embedment in a concrete slab |
| 12/11/1979 | US4177877 Safety vest |
| 12/04/1979 | US4177306 Transmits greater shear forces |
| 11/20/1979 | CA1066831A1 Method for bitumen-polyolefin-aggregate construction material |
| 11/13/1979 | US4173856 Anchor for the tilt-up and transport of prefabricated building components |
| 11/06/1979 | US4173367 Pickup unit for lifting concrete body |
| 11/06/1979 | CA1065641A1 Automatic building block laying panel-forming machine and method |
| 11/06/1979 | CA1065640A1 Wedge push-in apparatus for a wire tensioning press |
| 11/01/1979 | WO1979000856A1 A device for tensioning a reinforcing strand |
| 10/31/1979 | EP0005075A1 Connecting device for wires |
| 10/31/1979 | EP0005028A1 Bolt tensioning device |
| 10/30/1979 | US4172986 Vibrator |
| 10/30/1979 | CA1065366A1 Anchor for the tilt-up and transport of prefabricated building components |
| 10/16/1979 | US4171032 Safety support for safety belts |
| 10/16/1979 | CA1064438A2 Panel carrying tool |
| 10/16/1979 | CA1064432A1 Cement mixture blowing device |
| 10/16/1979 | CA1064282A1 Device for anchoring fixing means in a concrete element |
| 10/16/1979 | CA1064279A1 Remotely operable mechanism for disconnecting a pickup unit from a tilt-up concrete wall slab |
| 10/09/1979 | US4170443 Apparatus for forming sprinkler head protector |
| 10/09/1979 | US4170291 Articulate conveyor system for tower crane |
| 10/09/1979 | US4170093 Method and apparatus for erecting substantially dome-like building structures |
| 10/09/1979 | CA1063948A1 Transporter for slab casting tables |
| 10/02/1979 | CA1063378A1 Mortar applying machine |
| 09/11/1979 | CA1062034A1 Plug |
| 09/04/1979 | US4166347 Composite structural member and method of constructing same |
| 08/22/1979 | EP0003561A1 Conveying device for prefabricated concrete elements |
| 08/21/1979 | US4165114 Truss hoist |
| 08/21/1979 | US4165067 Apparatus for making substantially impenetrable members |
| 07/31/1979 | CA1059301A1 Method and apparatus for compressing sleeves onto structural rods |
| 07/26/1979 | WO1979000473A1 A method of casting concrete |
| 07/24/1979 | CA1059010A1 Binding tool |
| 07/17/1979 | US4161135 Fail safe fluid power device |
| 07/17/1979 | CA1058386A1 Method of constructing a pre-stressed concrete circular wall |
| 07/03/1979 | US4160146 Method for making reinforcing baskets for steel reinforced hollow concrete bodies |
| 06/26/1979 | CA1057076A1 Method for casting concrete structures |
| 05/29/1979 | US4156503 Method and a device for swivelling a spray nozzle about a swivelling axis |
| 05/15/1979 | US4154486 Cement mixture blowing device |
| 05/08/1979 | US4153270 Sliding hitch-ball holder and guide rack assembly |
| 04/24/1979 | US4150510 Safety gates |
| 04/10/1979 | CA1052122A1 Apparatus and method for anchoring building stone |
| 04/10/1979 | CA1052080A1 Method for constructing a blast furnace |
| 04/03/1979 | US4146951 Method and apparatus for tensioning concrete reinforcing tendons |
| 03/27/1979 | CA1051175A1 Method and apparatus for vacuum processing of concrete |
| 03/21/1979 | EP0001095A2 Anchoring and/or joining device for concrete elements or the like |
| 03/20/1979 | US4145024 Form for reinforced concrete wall |
| 03/20/1979 | US4144649 Brick alignment pole |
| 03/06/1979 | US4142815 Concrete slab striker |
| 03/06/1979 | US4142705 Means of construction of concrete culverts |
| 02/27/1979 | US4141183 Prestressed hollow chamber composite structural element capable of supporting heavy loads |
| 02/27/1979 | US4141146 Garden row locator and marker |
| 02/20/1979 | US4140250 Apparatus for separating and dispensing small, rigid, elongate articles |
| 02/13/1979 | CA1048253A1 Run-out apparatus and method for rollformed panels |
| 02/06/1979 | US4138162 Apparatus for piped conveyance of material |
| 02/06/1979 | US4137636 Profile system for walls and bracket therefor |
| 02/06/1979 | CA1047879A1 Tent with arched bows |
| 01/30/1979 | CA1047211A1 Upset head at a high-strength tension wire |
| 01/23/1979 | US4135651 Device for applying mortar |
| 01/02/1979 | US4132492 Concrete screed machine |
| 12/19/1978 | US4130134 Material conveying apparatus |
| 12/12/1978 | US4129197 Safety-catch scaffolding system |
| 12/12/1978 | US4128973 Method and apparatus for securing and stabilizing a lightweight, collapsible structure that is moving along a moving work site |
| 12/12/1978 | CA1043989A1 Method of eliminating an uneven stress distribution in an elongated reinforcing member |
| 12/05/1978 | US4128610 Method for casting concrete structures |
| 12/05/1978 | US4128359 Self-propelled concrete vibrator apparatus |
| 11/07/1978 | US4123882 Method of and apparatus for erectign concrete wall panels |
| 10/31/1978 | US4122648 Apparatus for placing masonry modules |
| 10/24/1978 | US4121943 Method for mixing steel fiber in concrete or mortar |
| 10/24/1978 | US4121780 Pre-stressing of concrete pressure vessels |
| 10/10/1978 | US4119176 Fall arrester, for building works |
| 10/03/1978 | US4117872 Binding tool |
| 09/26/1978 | US4115976 Method for screeding cement |
| 09/19/1978 | US4114337 Wasted spacer member for wall elements, especially for glass bricks |
| 09/19/1978 | US4114332 Anchoring system for prestressed concrete pipe |
| 09/19/1978 | US4114242 Cable grip gripping apparatus |
| 09/19/1978 | US4114220 Combination leveling and grade checking tool |
| 09/12/1978 | US4113117 Article handling apparatus |
| 09/12/1978 | US4112633 Protective workman and equipment covers |
| 09/05/1978 | CA1037690A1 Pre-stressed concrete contruction |
| 09/05/1978 | CA1037688A1 Method and means for anchoring a ring tensioning member in a circular container, especially a concrete tank or a concrete tube |
| 08/29/1978 | US4109681 Hoisting crane for building purposes |
| 08/15/1978 | US4106752 Jack for stressing concrete re-inforcement elements |