| Patents for E04H 12 - Towers; Masts, poles; Chimney stacks; Water-towers; Methods of erecting such structures (12,702) |
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| 06/23/1981 | US4274542 Method for transfer of crane from tower |
| 06/16/1981 | US4273225 Electrically operated mast for laser-controlled levelling system |
| 06/16/1981 | US4272929 Tower and method of construction |
| 06/10/1981 | EP0029831A1 Wooden pole for power lines or the like, and machine for producing same. |
| 06/09/1981 | US4271646 Post support means |
| 05/27/1981 | EP0029035A1 Barrier with retractable post |
| 05/19/1981 | CA1101230A1 Post assembly and method |
| 05/12/1981 | US4266768 Breakaway safety base |
| 05/05/1981 | US4265422 Pole mounting solar panel assembly |
| 05/05/1981 | US4265059 Kiosk |
| 04/14/1981 | US4262047 Fiberglass utility pole crossarm |
| 04/08/1981 | EP0026634A1 Column for supporting a lamp |
| 04/08/1981 | EP0026543A1 Self-erecting telescopable structure |
| 04/08/1981 | EP0026199A1 Anchoring base for road sign posts and similar |
| 04/07/1981 | US4259825 Foldable beam |
| 04/02/1981 | WO1981000902A1 Columns |
| 03/24/1981 | CA1097877A1 Pretensioning diagonals in lattice beam-columns |
| 03/10/1981 | CA1097100A2 Metal and brick chimney liner |
| 03/10/1981 | CA1097099A1 Metal and brick chimney liner |
| 03/03/1981 | US4254423 Telescopic equipment carrier including antennas |
| 03/03/1981 | US4253284 Foldable and curvilinearly extensible structure |
| 02/24/1981 | US4252472 Fixing posts in the ground |
| 02/10/1981 | US4249715 Sign apparatus |
| 02/05/1981 | WO1981000273A1 Mounting assembly for hydraulic conduits of a mobile apparatus |
| 02/03/1981 | US4248025 Knock down pole construction |
| 01/27/1981 | US4246732 Pole, in particular for electric lines |
| 01/13/1981 | US4244156 Pole and piling protector |
| 01/13/1981 | CA1093270A1 Lattice beam-columns |
| 01/06/1981 | US4242851 Pole construction |
| 01/06/1981 | US4242850 Metal water tower |
| 01/06/1981 | CA1092776A1 Rigid assembly joint |
| 01/06/1981 | CA1092774A1 Sealing arrangement for chimneys with an annular pressurized space |
| 12/23/1980 | CA1091888A1 Pole and method and apparatus for its production |
| 12/23/1980 | CA1091884A1 Storage tank construction |
| 12/16/1980 | US4238911 Telescoping columns |
| 12/16/1980 | CA1091465A1 Pole construction |
| 12/11/1980 | WO1980002709A1 Wooden pole for power lines or the like,and machine for producing same |
| 12/09/1980 | CA1091057A1 Composite structural member and method of constructing same |
| 12/09/1980 | CA1090981A1 Post construction |
| 12/02/1980 | US4236843 Sign post couplings |
| 12/02/1980 | CA1090526A1 Mast leveling and support apparatus |
| 11/27/1980 | WO1980002576A1 Barrier with retractable post |
| 11/25/1980 | US4235034 Removable sign post holding apparatus |
| 11/18/1980 | CA1089830A1 Terminal structure for outdoor luminaire |
| 11/12/1980 | EP0018902A2 Tower for supporting a windmill propeller |
| 11/11/1980 | US4232846 Base for poles |
| 11/04/1980 | US4231208 Guy guard and method of installing same |
| 11/04/1980 | US4231200 Method and apparatus for assembling a portable tower |
| 10/16/1980 | WO1980002173A1 Securing device with sliding sleeves,in particular for posts |
| 10/16/1980 | WO1980002167A1 Anchoring base for road sign posts and similar |
| 10/14/1980 | US4228489 Portable stand apparatus for electric flood lights |
| 09/23/1980 | US4223491 Guy wire guard |
| 09/17/1980 | EP0015256A1 Tubular post with yieldable fixing device. |
| 09/16/1980 | US4222680 Variable position friction joint |
| 09/16/1980 | CA1085641A1 Joint device for poles |
| 09/16/1980 | CA1085575A1 Wheeled portable trailer substructure for elevatable drawworks, masts and setback tower |
| 09/09/1980 | US4221088 Low lift, elevatable high floor drilling mast and substructure arrangement therefor |
| 08/26/1980 | US4219342 Pollution control system |
| 08/19/1980 | US4218278 Apparatus and method for fabricating stake flags |
| 08/19/1980 | US4217738 Windmill tower |
| 08/12/1980 | US4216709 Chimney |
| 08/12/1980 | US4216636 Tower |
| 08/12/1980 | US4216632 Support member and method of manufacture |
| 07/08/1980 | US4212015 Portable mast for radio link systems |
| 07/08/1980 | US4211179 Columnar structure |
| 05/28/1980 | EP0011197A1 Device for putting up road signs |
| 05/27/1980 | US4204463 Stack design |
| 05/20/1980 | US4203267 Multiple strand tower guy assembly |
| 05/20/1980 | US4203266 Mast leveling and support apparatus |
| 05/20/1980 | CA1077672A1 Base for poles |
| 04/29/1980 | US4200906 Lighting standard support |
| 04/29/1980 | US4199908 Post base elevator |
| 04/16/1980 | EP0009568A2 Liner construction for stack-like structures and a method of constructing such a liner construction |
| 04/08/1980 | US4196551 Sectional tower structure |
| 04/08/1980 | US4196550 Post |
| 04/02/1980 | EP0009451A1 Telescopic mast |
| 04/01/1980 | US4195808 Combination mounting bracket and support pipe |
| 03/25/1980 | US4194338 Construction components, assemblies thereof, and methods of making and using same |
| 03/18/1980 | US4194080 Utility line support structure |
| 03/18/1980 | CA1073632A1 Semi-lattice pole |
| 03/11/1980 | US4192109 Components of retractable beams, and assemblies thereof |
| 03/04/1980 | US4191099 Sealing arrangement for chimneys with an annular pressurized space |
| 03/04/1980 | US4190993 Liner construction |
| 02/26/1980 | US4190881 Crossarm assembly for high intensity discharge luminaries |
| 02/26/1980 | US4189892 Angle guide apparatus |
| 02/05/1980 | US4187034 Rigid joint assembly |
| 01/23/1980 | EP0006984A1 Signal or light pole for traffic areas |
| 01/15/1980 | CA1069719A1 Method of chimney construction |
| 12/25/1979 | CA1068505A Concrete tank of precast concrete panels with pretensioned beam means |
| 11/28/1979 | EP0005575A1 Prefabricated chimney |
| 11/20/1979 | CA1066474A1 Tri-anchor bracket for poles |
| 11/13/1979 | US4173853 Modular church steeple |
| 11/06/1979 | US4173331 Method and arrangement for staying climb rods for co-operation with so-called climbing jacks |
| 11/06/1979 | CA1065575A1 Modular drill rig erection system |
| 10/31/1979 | EP0005065A2 Yieldable upright assembly |
| 10/23/1979 | US4172175 Tapered fiberglass support |
| 10/17/1979 | EP0004820A2 Anchor for fixing posts or stakes in the earth and method and device for driving-in the anchor |
| 10/17/1979 | EP0004538A1 Conic tube of helically wound strip material |
| 10/16/1979 | US4170854 Joint between the lower portion and the main portion of a loading crane post and a method of providing such a joint |
| 09/04/1979 | US4167033 Luminaire mounting device |