Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 7243956 | Expandable band and locking mechanism The expandable band is used to secure a sealing element within a generally cylindrical structure, such as a pipe or manhole, or other round hole. The expandable band includes a band body having a first band end portion and a second band end portion. The first band e... | 07/17/2007 |
| 6953194 | Expandable band and locking mechanism The expandable band is used to secure a sealing element within a generally cylindrical structure, such as a pipe or manhole, or other round hole. The expandable band includes a band body having a first band end portion and a second band end portion. The first band e... | 10/11/2005 |
| 6866301 | Expandable band and locking mechanism The expandable band is used to secure a sealing element within a generally cylindrical structure, such as a pipe or manhole, or other round hole. The expandable band includes a band body having a first band end portion and a second band end portion. A plurality of s... | 03/15/2005 |
| 6364373 | Corrugated pipe adapter and connection system A corrugated pipe adapter for providing a sealing surface on a corrugated pipe includes a generally cylindrical sleeve having a generally smooth outer clamping surface and at least one protrusion. The protrusions include side walls and an arched structure... | 04/02/2002 |
| 6152455 | Expandable band and locking mechanism The expandable band is used to secure a sealing element within a generally cylindrical structure, such as a pipe or manhole, or other round hole. The expandable band includes a band body having a first band end portion and a second band end portion. A plu... | 11/28/2000 |
| 5641256 | Anchoring device for a threaded member An anchoring device for anchoring a threaded member such as a screw or bolt in a substrate material includes an anchoring sheath for receiving the threaded member. The anchoring sheath includes annular anchoring ribs formed around a body portion of the an... | 06/24/1997 |
| 5595524 | Grinding apparatus and method which supports a workpiece on the surface being ground A method and apparatus for grinding a surface on a workpiece, such as a spigot on a pipe, while supporting the workpiece on the surface being ground. The grinding apparatus includes workpiece support wheels, two of which are positioned beneath the workpie... | 01/21/1997 |
| 5580068 | Liquid filled seal A liquid-filled seal for sewer pipes. The seal comprises a hollow trapezoidal cavity formed by spaced circumferentially extending walls and radially extending walls of elastomer or other material formed of substantially uniform thickness. Additional mater... | 12/03/1996 |
| 5431459 | Band with slotted wedge cams A band assembly for effecting a seal particularly adapted for use in establishing a joint between a sewer pipe and a reinforced concrete manhole riser. The seal is affected by a tapered elastomeric tubular connector boot and a clamping band member with an... | 07/11/1995 |
| 5360241 | Universal saddle tee for pipes A saddle tee assembly for connecting a lateral pipe to a main pipe. The saddle tee assembly includes a saddle tee boot, a collar means and clamping device. The saddle tee boot has a flexible saddle and cylindrical hollow tee section. The saddle attaches t... | 11/01/1994 |
| 5029907 | Band for effecting a seal A band assembly for effecting a seal particularly adapted for use in establishing a joint between a sewer pipe and a reinforced concrete manhole riser. The seal is affected by a tapered elastomeric tubular connector boot and a clamping band member that ex... | 07/09/1991 |
| 4993722 | Apparatus and method for improved pipe to manhole sealing An apparatus for sealably and flexibly joining together a pipe member and an enclosed body in a sewer system having a seal comprising an elastic sleeve with an annular cavity. The cavity contains a coagulant material that forms a cellular, viscous gel whe... | 02/19/1991 |
