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| Number | Title | Issue Date |
| 7018466 | Process for producing a concrete and a mortar A concrete admixture or a mortar admixture which is obtained by mixing a silicate with an acid in the presence of water and then solidifying the mixture. It is preferable that the silicate is sodium silicate and the acid is a carboxylic acid. This admixture can impr... | 03/28/2006 |
| 7023468 | Photo survey service system The photo survey service system of the invention comprises an image information receiving means 12 for receiving image information from customer's terminal equipment 8 via a telecommunication circuit network 10, which image information is obtain... | 04/04/2006 |
| 6817427 | Device and method for extracting a gas hydrate This invention aims to provide a gas-hydrate extracting device and method whereby a high-performance jet fluid is injected from a nozzle at the tip of an extraction pipe inserted into a gas-hydrate stratum, and whereby said jet fluid breaks said stratum so as to for... | 11/16/2004 |
| 6347838 | Method for replacing cutters of tunnel-excavating machine, method for excavating tunnel, and tunnel excavating machine Cutter spokes are disposed on a cutterhead of a tunnel-excavating machine. Movable blocks, each having a roller cutter, are movably supported by each of the cutter spokes while being connected one another by means of a connection link. A gate mechanism is... | 02/19/2002 |
| 5101605 | Domed structures having retractable roofs A domed structure having a retractable roof comprises a field area obtained by digging out a hollow, substantially concave in section, in the ground and levelling the bottom of the hollow seats for the spectators are provided by extending an upward slope ... | 04/07/1992 |
| 5058332 | Domed structures having retractable roofs A domed structure having a retractable roof comprises an inside field area, a ringed structure vertically provided around said field area, two tracks laid out on the top of said ringed structure and two movable semi-vaults travelling separately on said tw... | 10/22/1991 |
| 4767240 | Pile-framed structure An underwater pile-framed structure comprises a plurality of upright piles 11 arranged in two parallel and spaced rows, reinforcing cages 13 surrounding the piles in peripherally spaced relationship thereto, and precast block stacks 22, 23 connecting toge... | 08/30/1988 |
