| Patents for E04H 12 - Towers; Masts, poles; Chimney stacks; Water-towers; Methods of erecting such structures (12,702) |
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| 02/25/1992 | US5090656 Post support |
| 02/25/1992 | US5090165 Pole and post sleeve or boot |
| 02/19/1992 | CN2096601U Circular part inherent concrete pole |
| 02/19/1992 | CN1058766A Reinforced concrete antirust wire pole |
| 02/18/1992 | US5088681 Beach umbrella |
| 02/12/1992 | EP0470945A1 Chimney element, system of multiple chimneys, and method of manufacture of a chimney element |
| 02/10/1992 | CA2023050A1 Tower supported gas transmission line |
| 02/06/1992 | WO1992001850A1 Tower structure |
| 02/06/1992 | DE4119466A1 Extensible and retractable tower structure |
| 02/06/1992 | DE4023465A1 Turmbauwerk Tower building |
| 02/05/1992 | EP0469353A1 External covering for reinforced concrete surfaces |
| 02/05/1992 | EP0469269A1 Retractable tower |
| 02/04/1992 | US5085281 Slide hammer apparatus |
| 01/23/1992 | DE4026936C1 Extensible mast for aerospace vehicle - has triangular cross=section with thin walled plastics strips |
| 01/21/1992 | US5082231 Post holder and marker therefor |
| 01/21/1992 | US5081804 Power line pylon and lamp post |
| 01/17/1992 | WO1992001851A1 Extendable mast support system |
| 01/17/1992 | CA2087441A1 Extendable mast support system |
| 01/15/1992 | EP0466292A1 Posts for anchoring wooden play apparatus |
| 01/14/1992 | US5079891 Bidimensional truss structure, particularly support for overhead electric energy transmission lines |
| 01/12/1992 | CA2030458A1 Precast concrete panels, support pedestals constructed therefrom and an associated method |
| 01/02/1992 | DE4016983A1 Telescopic mast for measuring appts. or antenna - has outer circular tube, square cross-section tube and inner circular tube |
| 12/31/1991 | US5076032 Post and anchoring device |
| 12/26/1991 | WO1991019871A1 Interlocking support structures |
| 12/19/1991 | DE4114871A1 Flag pole with mechanism to raise flag |
| 12/18/1991 | EP0461470A1 A table-container and relative support also for a beach umbrella, particularly for free time |
| 12/10/1991 | US5070809 Kinetic banner display |
| 12/04/1991 | EP0459847A1 Luminaire and lighting installation for streets. |
| 12/03/1991 | US5069948 Structural unit having hingedly connected tetrahedrons |
| 12/03/1991 | CA2021260C Anchoring post assembly |
| 12/02/1991 | CA2042561A1 Roadway lighting fixture and multiple fixtures lighting installation |
| 12/01/1991 | CA2018134A1 Synthetic fiber post |
| 11/28/1991 | WO1991018165A1 Anchoring and bedding method by using digging cross stays |
| 11/28/1991 | WO1991018163A1 Lattice-framed mast |
| 11/27/1991 | EP0304418B1 Marker post system |
| 11/21/1991 | EP0456869A1 Pole construction |
| 11/19/1991 | US5065975 Mail box support apparatus |
| 11/12/1991 | US5063969 Self-erecting spiral metal tube with one textured side |
| 11/12/1991 | US5063719 Column base structure |
| 11/07/1991 | DE4019191A1 Plant for disposal of waste gases - combines chimney stack on top of lime washing appts. within single vertical structure |
| 11/06/1991 | EP0455581A1 Post support |
| 11/06/1991 | CN1014624B Insulating equipment for electric line pole and method for making it |
| 11/05/1991 | US5062245 Telescopic beam |
| 11/02/1991 | WO1991017331A1 Structure consisting of primary and secondary structures |
| 11/02/1991 | CA2086613A1 Structure consisting of primary structure and secondary structures |
| 10/30/1991 | CN2087656U Easy flag-raising flagpole |
| 10/29/1991 | US5060907 Base for an umbrella |
| 10/29/1991 | US5060435 Bracket for support of vertical pole |
| 10/23/1991 | EP0453252A1 Sockets |
| 10/22/1991 | US5058337 Ground anchor |
| 10/22/1991 | US5058336 Hinged flange pole |
| 10/15/1991 | US5056278 Extension support unit |
| 10/15/1991 | CA1290545C Marker post system |
| 10/10/1991 | DE4109964A1 Vibration absorber for chimney - consists of ball rolling on concave floor of housing containing liquid |
| 10/02/1991 | DE4109962A1 Damper for wind induced vibration of tall building structures - has damping mass suspended on balls seated in ball cups in viscous damping liq., esp. silicone oil |
| 10/02/1991 | DE4009893A1 Vibration damper for chimney - is suspended pendulum-fashion with movements restricted by retainers connected to structure |
| 09/25/1991 | EP0447572A1 Lifting procedure and device for tubular elements in industrial smoke stacks |
| 09/25/1991 | CN1054758A Method for making float stone stovepipe |
| 09/24/1991 | US5051285 Core with extruded plastic layer of a polyolefin |
| 09/24/1991 | US5050828 Removable sign post assembly |
| 09/24/1991 | US5050356 Immured foundation |
| 09/18/1991 | EP0447326A1 Method and device for fixation of a post and its vertical adjustment on a foundation block |
| 09/18/1991 | EP0447310A1 Concrete tubular structure, especially for offshore structures |
| 09/18/1991 | CN2084962U Flag fluttering device |
| 09/12/1991 | DE4006958A1 Telescopic tube for temporary street adornment - incorporates set of guide and mating grooves |
| 09/10/1991 | US5046699 Anchoring device for post |
| 09/10/1991 | US5046695 Device intended for attachment to the outer surface of a cylindrical object |
| 09/06/1991 | CA2011528A1 Windcap |
| 09/05/1991 | WO1991013222A1 Improved balustrade anchorage assembly |
| 09/03/1991 | US5044301 Automatic flag unfurler |
| 08/29/1991 | WO1991013225A1 Apparatus and method for building a foundation for uprights or for making passages therethrough |
| 08/21/1991 | CN2083171U Reverse cleaning storage water tower |
| 08/21/1991 | CA2036710A1 Automatic flag unfurler |
| 08/20/1991 | CA1287730C Fence posts |
| 08/13/1991 | US5038705 Warning stay-guard |
| 08/13/1991 | US5038540 Sectional smokestack |
| 08/07/1991 | EP0440531A1 Means and method for rigidly elevating a structure |
| 08/07/1991 | EP0309488B1 Non-clamping barrier posts |
| 07/30/1991 | US5036162 Triaxial mount |
| 07/30/1991 | US5035094 Nested extension/retraction structure and method of fabrication |
| 07/25/1991 | DE4001916A1 Flag-pole with built-in hoist - has clamping cylinder movable vertically in plastics guide block for rope |
| 07/17/1991 | EP0437123A2 Structure for supporting a directional apparatus mounted at the top of a mast |
| 07/09/1991 | US5029426 Precast concrete panels, support pedestals constructed therefrom and an associated method |
| 07/09/1991 | CA1285738C Structurally reinforced, pre-fabricated and modular chimney facade system |
| 07/04/1991 | DE3942287A1 Tilting mast locking mechanism - has locking pin with stops, engaging bores in hollow foot, and fixed shoe |
| 07/03/1991 | EP0434770A1 Post, specially for supporting electric power supply cables |
| 07/02/1991 | US5027575 Method and apparatus for composite pole repair |
| 06/26/1991 | EP0434548A1 Architectural structure consisting of a support for a mast antenna and a high power transmitter |
| 06/25/1991 | US5025606 Guy control system for extensible mast |
| 06/18/1991 | US5024037 Process for connection of supports, and support system |
| 06/18/1991 | US5024036 Multi-celled |
| 06/11/1991 | US5022134 Method of repairing/replacing a pole and associated pole replacement system |
| 06/06/1991 | DE3939707A1 Flag pole with external hoist rope - has both falls reeved at bottom round non-rotating spring-loaded disc |
| 06/05/1991 | EP0430410A1 A power actuable, openable and closable, lockable and unlockable, hinge assembly |
| 06/05/1991 | CN1051955A Extension support unit |
| 06/05/1991 | CN1012747B Water tower |
| 06/04/1991 | US5020764 Pole ballasting device |
| 05/29/1991 | DE3939085A1 Indoor flagstaff for exhibition hall - contains fans generating transverse air currents over whole flag length |
| 05/29/1991 | CN1012691B Partially prestressed electric wire pole with equal diameter |
| 05/23/1991 | CA2030393A1 Extension support unit |