Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7004679 | Easily-cuttable tunnel segment structure The present invention relates to a novel easily-cuttable tunnel segment structure used for the departure of a shield machine from a main tunnel to a branch tunnel or the return to the main tunnel from the branch tunnel, and provides an easily-cuttable tunnel segment... | 02/28/2006 |
| 6969415 | Vent for and method of concealing and venting a septic system Disclosed are a vent disclosed for a septic system, including a conduit configured to vent gas therefrom, including a leg configured to conceal a portion of, and convey gas from, the conduit, and a method of concealing a conduit configured to vent gas from a septic ... | 11/29/2005 |
| 6520718 | Sardine-bone construction method for large-section tunnel This invention relates to a method for boring a large-section tunnel safely and quickly by reinforcing and improving in advance the ground over the full length of the tunnel section, which includes; boring a top drift (2) through the full length of the tu... | 02/18/2003 |
| 5451315 | Ore pass shaff water drainage means An ore pass rush eliminator is disclosed which includes, in the ore pass shaft, a channel formed in the base of the shaft whereby excess water can pass to waste to avoid any build up of such water. Further described are means whereby the channel may be ke... | 09/19/1995 |
| 5199817 | Process of providing an elongate underground cavity In the provision of elongate underground cavities having a large volume are to be provided, particularly in the construction of underground railroad stations having at least two stories, it is desired to avoid a need for excavating an open pit and to mini... | 04/06/1993 |
| 5104259 | Method for excavating rock cavities The present invention relates to a method for excavating and preparation of rock cavities and then substantially spherical rock cavities or rock cavities having spherically shaped parts, such as dome-shaped ceilings, which rock cavities are intended as sh... | 04/14/1992 |
| 4166509 | Process for excavating and constructing tunnel and excavating device A process for excavating and constructing a tunnel, and an excavating device are disclosed. This process is directed to excavating and constructing a tunnel under a railway or a road on a banking or on level land in the direction transverse to the railway... | 09/04/1979 |
| 4147452 | Method for constructing a rectangularly shaped tunnel A rectangularly shaped tunnel is constructed to include an artificial roof, side wall pillars, a center wall pillar and floor portions all extending along the length of tunnel. The artificial roof is formed by sequentially excavating cross cut shafts and ... | 04/03/1979 |
| 3996751 | Method of blasting and reinforcing rock cavities Before the rock cavity is completely excavated a plurality of arcuated tunnels extending between the top and bottom levels of the intended rock cavity are cut out in the rock outside the future side walls of the cavity, and these tunnels are filled with r... | 12/14/1976 |
| 3968655 | Method of reinforcing tunnels before excavation This invention relates to a method of reinforcing tunnels which comprises driving a crown drift along the top of the proposed tunnel, driving a pair of wall plate drifts along opposite sides of the proposed tunnel in spaced substantially parallel relation... | 07/13/1976 |
