| Patents for E04H 12 - Towers; Masts, poles; Chimney stacks; Water-towers; Methods of erecting such structures (12,702) |
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| 06/26/1990 | US4936198 System for decontaminating a polluted-air region |
| 06/19/1990 | US4934675 Apparatus for temporarily repairing utility poles or the like |
| 06/19/1990 | US4934114 Lightweight line tower kit |
| 06/19/1990 | US4934097 Barrier post free of jamming points |
| 06/15/1990 | CA2003302A1 System for assembling and disassembling a mast |
| 06/14/1990 | WO1990006411A1 An arrangement for securing a post in a foundation |
| 06/13/1990 | EP0372055A1 Telescopic beam. |
| 06/13/1990 | DE3939465A1 Protective sheathing for latticed steel structure masts - consists of several layers of different materials with high mechanical and fire resistance |
| 06/13/1990 | CN1008383B Method for producing a tubular node |
| 06/12/1990 | US4932623 Bracket |
| 06/12/1990 | US4932176 Extendible and retractible mast system |
| 06/05/1990 | US4930753 Moldable edge connecting apparatus |
| 05/30/1990 | EP0370314A2 Mobile antenna assembly with a telescopic mast |
| 05/30/1990 | EP0370280A1 Device for demolishing chimneys |
| 05/29/1990 | US4928446 Break-away sign post and post ground anchor |
| 05/23/1990 | EP0369042A1 Deployable and collapsible structure |
| 05/23/1990 | DE3839013A1 Movable, wind-proof stand for parasols |
| 05/22/1990 | US4927674 Woven wire apparatus |
| 05/22/1990 | US4926785 Marker post system |
| 05/16/1990 | CN1008034B Telescoping lightweight antenna tower assembly and the like |
| 05/15/1990 | US4925142 Electrical utility pole davit arm |
| 05/15/1990 | US4924648 Standoff timber base connection |
| 05/08/1990 | US4923165 Stabilized post anchor |
| 05/08/1990 | US4923164 Post support and anchor |
| 05/08/1990 | US4923157 Signpost support bracket |
| 05/02/1990 | EP0365658A1 Post support |
| 05/02/1990 | CN1041807A Partially prestressed electric wire pole with equal diameter |
| 05/01/1990 | US4921555 Process for reinforcing utility poles |
| 05/01/1990 | US4921200 Peg for fixing posts or stakes in the ground |
| 05/01/1990 | US4920897 Beach and lawn table with umbrella holder |
| 05/01/1990 | US4920710 Retractable column and method of forming |
| 04/24/1990 | US4918896 Telescopic flagpole |
| 04/24/1990 | US4918884 Deployable and collapsible structure |
| 04/24/1990 | US4918883 Apparatus for composite pole repair |
| 04/18/1990 | CN2056177U Pole joint of reinforced concrete |
| 04/17/1990 | US4918460 Telescopic mast with a reel for winding sets of stays |
| 04/04/1990 | EP0361741A1 Post support |
| 04/03/1990 | US4914258 Utility pole having an access opening cover over a raised perimeter access opening |
| 04/03/1990 | US4913428 Portable net tightening post assembly |
| 04/03/1990 | US4912893 Transportable CMR cell site |
| 04/03/1990 | US4912890 Air/water cranes |
| 03/22/1990 | WO1990002860A1 Improvements in or relating to posts |
| 03/13/1990 | US4907913 Point of junction of tubular metallic structures, notably for derrick platforms |
| 02/28/1990 | EP0355344A1 Support for a post |
| 02/28/1990 | EP0355233A1 Insulated junction box, especially for mounting in luminaire supports |
| 02/27/1990 | US4903442 Mast for measuring or illumination purposes, especially for flight navigation lights |
| 02/14/1990 | CN1006818B Base support for pole |
| 02/13/1990 | US4899511 Post construction kit |
| 02/13/1990 | US4899500 CMR cell site |
| 02/01/1990 | DE3824675A1 Stand for receiving an object to be held in the upright position |
| 01/25/1990 | DE3824731A1 Umbrella holder (angler's umbrella holder) |
| 01/23/1990 | US4896165 Module for expandable structure and expandable structure employing said module |
| 01/16/1990 | US4894759 Pre-wired unitary support assembly for floodlights |
| 01/11/1990 | DE3822700A1 Auxiliary apparatus for mounting a work arm on a profiled load-bearing member |
| 01/09/1990 | US4892601 Pole repair system |
| 12/26/1989 | US4889321 Apparatus for rotatably mounting a winch within an enclosure |
| 12/21/1989 | DE3820698A1 Foundation made of prefabricated parts for signposts |
| 12/20/1989 | EP0273904B1 Device for lighting up flags |
| 11/30/1989 | WO1989011575A1 Telescopic beam |
| 11/28/1989 | US4883186 Easy erecting telescopic mast |
| 11/23/1989 | DE3816451A1 Multilayered plastic mast |
| 11/21/1989 | CA1263161A1 Cable support for electric poles |
| 11/08/1989 | CN1037009A Insulating equipment for an electric line pole and method for making it |
| 11/07/1989 | US4878984 Apparatus for forming a filament-wound structure on a cylindrical pole |
| 11/02/1989 | WO1989010514A1 Post support |
| 10/31/1989 | US4878160 Outdoor lightpole |
| 10/26/1989 | DE3812557A1 Device for setting up corner posts for mast feet |
| 10/26/1989 | DE3811401A1 Coverable ground-mounted sleeve for securing a mast |
| 10/25/1989 | EP0338389A2 Lighting fixture comprising a pole, a supporting arm and a lamp, particularly for use as a street lamp |
| 10/18/1989 | EP0337673A2 Arrangement including a moveable tower |
| 10/18/1989 | EP0189395B1 Poleshaped supporting member, and base structure for attachment of same |
| 10/17/1989 | US4874149 Post support |
| 10/12/1989 | DE3810260A1 Flag |
| 10/11/1989 | EP0336747A2 Extensible mast support system |
| 09/27/1989 | EP0334821A2 A device for the supporting without a central post and the winch opening of large sunshades and similar |
| 09/19/1989 | US4867399 Insulating equipment for an electric line pole and method for making it |
| 09/19/1989 | US4866893 Extensible mast |
| 09/19/1989 | US4866892 Extensible structure |
| 09/12/1989 | US4865287 Signal device |
| 09/12/1989 | US4864962 Combination flagpole and bracket |
| 09/12/1989 | US4864784 Mast extending and rotating apparatus |
| 09/12/1989 | CA1259162A1 Repairing utility poles |
| 09/05/1989 | US4863137 Post anchor |
| 09/05/1989 | US4862992 Noise barrier |
| 08/29/1989 | US4860940 Method of making a post support |
| 08/24/1989 | DE3804193A1 Process, apparatuses and devices for telescopic masts of mobile and stationary lifting gear |
| 08/24/1989 | DE3804017A1 System which can be used to arrange flags |
| 08/23/1989 | CN2043255U Air-filled buoyancy chimney |
| 08/22/1989 | US4858876 Post support |
| 07/26/1989 | EP0325311A1 Hollow mast which can be lowered |
| 07/25/1989 | US4850565 Post support |
| 07/25/1989 | US4850564 Windproof umbrella holder |
| 07/25/1989 | US4850161 Extensible mast support system |
| 07/25/1989 | CA1257763A1 Post clamp |
| 07/05/1989 | CN1004716B Plastic pole for holding wire and device for fibre winding |
| 06/28/1989 | EP0322039A1 Anchor block |
| 06/01/1989 | WO1989004757A1 The improved method of creating inflatable products |
| 05/31/1989 | CN2038524U Combined contact-net support |
| 05/30/1989 | US4833846 Ground anchor system for supporting an above ground structure |
| 05/23/1989 | US4832304 Ground-anchoring device particularly for umbrellas |