| Patents for E04H 12 - Towers; Masts, poles; Chimney stacks; Water-towers; Methods of erecting such structures (12,702) |
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| 05/23/1989 | US4832163 Portable table system |
| 05/18/1989 | WO1989004428A1 A device intended for attachment to the outer surface of a cylindrical object |
| 05/16/1989 | CA1254021A1 Peg for fixing posts or stakes in the ground |
| 05/11/1989 | DE3812270C1 Antenna array |
| 05/03/1989 | DE3735994A1 Device for monitoring the pylons of an overhead line |
| 04/26/1989 | EP0312675A1 A stick for a sunshade with autopenetrating point for shores, meadows and generally non-rocky soils |
| 04/24/1989 | EP0304418A4 Marker post system. |
| 04/19/1989 | EP0312205A1 Base for a metal post |
| 04/18/1989 | CA1252605A1 Cross-arms for utility poles |
| 04/11/1989 | US4819904 Support member |
| 04/06/1989 | WO1989002962A1 Pole support device |
| 04/05/1989 | EP0309488A1 Non-clamping barrier posts. |
| 04/04/1989 | CA1252197A1 Telescoping lightweight antenna tower assembly and the like |
| 04/04/1989 | CA1251916A1 Post support means |
| 03/29/1989 | EP0221992B1 Post |
| 03/28/1989 | US4815494 Water tower |
| 03/22/1989 | CN1031876A Improved pole repair system |
| 03/15/1989 | CN2034187U Lifting type light projecting lighthouse |
| 03/14/1989 | US4812958 Electrical services pole |
| 03/08/1989 | EP0306325A1 Telescopic masts |
| 03/07/1989 | US4809734 Condensate-collecting ceiling for elevated water tower facility |
| 03/07/1989 | CA1250757A1 Utility pole |
| 03/07/1989 | CA1250731A1 Wooden utility pole repair collar and method |
| 03/02/1989 | DE3835296A1 Earth plug |
| 03/01/1989 | EP0304909A2 Chimney cowl |
| 03/01/1989 | EP0304418A1 Marker post system. |
| 02/23/1989 | DE3726697A1 Subdivided centrifugally cast concrete mast with coupling, and process for producing the coupling |
| 02/15/1989 | EP0303365A2 Improved pole repair system |
| 02/14/1989 | US4803824 Truss structure and method and apparatus for construction thereof |
| 02/14/1989 | US4803819 Supporting means for an electrical current delivery system |
| 02/14/1989 | US4803812 Post ground anchor and method |
| 02/14/1989 | CA1249913A1 Methods and apparatus for supporting tubular posts |
| 02/09/1989 | WO1989001108A1 Utility insulated cross-arm |
| 02/09/1989 | WO1989000917A1 A fibre reinforced tube element and a method for its manufacture |
| 01/31/1989 | US4801123 Support stand for pole-like objects |
| 01/31/1989 | US4800834 Telescopic rod means with rolling display sheet |
| 01/31/1989 | US4800690 Stack system |
| 01/31/1989 | CA1249411A1 Pre-stressed truss-like beam with elements in buckled state |
| 01/26/1989 | DE3823849A1 Ventilation tower for decontaminating the contaminated atmosphere |
| 01/24/1989 | US4799340 Barrier for utility pole |
| 01/11/1989 | CN2030762U New-type tv tower |
| 12/28/1988 | EP0296957A2 Self-erecting telescoping mast |
| 12/27/1988 | US4793111 Threaded mounting for extruded pole |
| 12/22/1988 | DE3718436A1 Process for producing tower-like structures |
| 12/20/1988 | US4791878 Flagpole assembly |
| 12/20/1988 | CA1246829A1 Method and apparatus for installing an in-ground support footing around an upstanding elongate object |
| 12/15/1988 | DE3718787A1 Chimney, and process for erecting the same |
| 12/13/1988 | US4790533 Baseball base setting apparatus |
| 11/30/1988 | EP0293109A1 Truss structure |
| 11/29/1988 | US4787601 Decorative border fence system |
| 11/29/1988 | CA1245615A1 Portable light support apparatus |
| 11/23/1988 | EP0292254A2 Erectable structure truss attachment joint |
| 11/23/1988 | CN88200761U Inclinable lamp pole |
| 11/22/1988 | US4785592 Method for raising a multi-element mast and apparatus for performing the method and masts provided with these means |
| 11/17/1988 | WO1988008911A1 A bracket |
| 11/17/1988 | EP0290681A1 Juncture assembly between assemblable elements of a support frame, in particular of a crane |
| 11/17/1988 | DE3714640A1 Reinforced-concrete shell for reinforcing the shaft cross-section of a tower-like reinforced-concrete structure |
| 11/09/1988 | EP0290208A1 Hinged flange pole |
| 11/08/1988 | CA1244259A1 High, self-supporting smokestack or tower of precast reinforced concrete parts |
| 10/26/1988 | EP0288323A2 Collapsible structure |
| 10/26/1988 | CN87216019U Self-anchoring chimney stack and cross-beam base |
| 10/25/1988 | US4779389 Method and apparatus for insitu reinforcement, repair and safety enhancement of wooden poles |
| 10/20/1988 | WO1988008066A1 Anchoring device |
| 10/20/1988 | WO1988008056A1 Non-clamping barrier posts |
| 10/20/1988 | WO1988007848A1 Arrangement for raising or lowering loads, in particular infirm or disabled persons |
| 10/19/1988 | EP0286998A1 Threaded mounting for extruded pole |
| 10/18/1988 | US4778142 Awning anchor |
| 10/13/1988 | DE3807360A1 Chimney for treating gaseous material flows |
| 10/12/1988 | EP0286480A2 Insulating strengthening for supporting poles for electric lines and manufacturing method |
| 10/12/1988 | CN88100488A Apparatus for winding fibers on plastic rod essencially for supporting wire |
| 10/11/1988 | US4776140 Modular block anchor |
| 10/05/1988 | EP0285584A2 A post structure |
| 10/04/1988 | US4775258 Connecting apparatus |
| 09/28/1988 | EP0284127A2 Apparatus for tying or anchoring wooden posts or the like |
| 09/22/1988 | WO1988007117A1 Marker post system |
| 09/20/1988 | US4772894 Device for wind bracing the members of a lattice mast and lattice mast provided with said devices |
| 09/20/1988 | US4771585 Collapsible truss unit for use in combination with other like units for the construction of frameworks |
| 09/15/1988 | DE3706680A1 Method and device for monitoring electricity pylons for intentional damage |
| 09/13/1988 | US4769967 Pole of plastic material, in particular for supporting electric power transmission lines |
| 09/13/1988 | US4769959 Temporary power line tower assembly and method of installing same |
| 09/07/1988 | EP0193532B1 Device for pole-shaped elements |
| 08/23/1988 | US4765277 Telescopic pole system |
| 08/16/1988 | CA1240525A1 Mobile percussive apparatus for driving hollow objects the ground |
| 08/04/1988 | DE3702123A1 Device for protecting high-voltage transmission masts |
| 07/28/1988 | DE3700449A1 Process for the protection of high-voltage pylons against sabotage |
| 07/27/1988 | EP0275500A2 Process concerning the stability of masts |
| 07/27/1988 | EP0160651B1 A telescopic mast |
| 07/19/1988 | US4757592 Method of erecting a portable drilling rig |
| 07/13/1988 | EP0273904A1 Device for lighting up flags. |
| 07/12/1988 | US4756130 Apparatus for reinforcing utility poles and the like |
| 06/30/1988 | WO1988004712A1 Method of fixing a column on a foundation |
| 06/28/1988 | US4753411 Portable beach umbrella safety base |
| 06/21/1988 | US4751804 Utility pole |
| 06/21/1988 | US4751801 Post for traffic signals and the like |
| 06/15/1988 | EP0271071A2 Monitoring system for electricity pylons |
| 06/15/1988 | EP0270988A1 Post, especially for parking meters |
| 06/09/1988 | DE3640479A1 Adjusting device for narrow structures |
| 06/07/1988 | CA1237568A1 Base support for pole |
| 05/31/1988 | US4747725 Device for pole-shaped elements |
| 05/31/1988 | US4747506 Adjustable outlet box mounting assembly |