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| Number | Title | Issue Date |
| 7325787 | Barrier A barrier formed from one or more barrier tapes, which may be barbed. Two lower barrier tapes are supported on the opposed projecting arms of outrigger system installed atop a structure such as a wall, gate or fence. Each extended lower barrier tape is formed from l... | 02/05/2008 |
| 6926262 | Barbed tape A barrier structure includes a continuous piece of elongated metal tape. The metal tape includes barbs spaced along an elongate body. Each of the barbs is connected securely to a barb root, and each barb root is connected securely to the elongate body. A first regio... | 08/09/2005 |
| 6363653 | Device for preventing rats from climbing A device for preventing rats from climbing, characterized in that the device made of deformable plate (1), such as metal plate, comprises a plurality of adjacently arranged deformable plates (3) and a fixing part (2) for fixing the plurality of deformable... | 04/02/2002 |
| 4920775 | Apparatus for making barbed tape An apparatus and process is provided for forming a helical barbed tape. The process first involves supplying rolled steel which is passed to an apparatus for blanking barbs and cutting the steel into strips. The strips are mounted on individual cassettes.... | 05/01/1990 |
| 4903384 | Apparatus for the manufacture of a roll of coiled, clamped barbed wire A method and apparatus for providing barbed strap coils without a core by means of a ring coiling device (50) that has no winder provides a single clamping device (96), whereby the coiling is interrupted for the placement of a clamp. A guide device (11B) ... | 02/27/1990 |
| 4784373 | Barbed tape An appartus and process is provided for forming a helical barbed tape. The process first involves supplying rolled steel which is passed to an apparatus for blanking barbs and cutting the steel into strips. The strips are mounted on individual cassettes. ... | 11/15/1988 |
| 4718641 | Barbed tape with reinforced barbs A helical barbed tape is provided with reinforced barbs. The tape includes a plurality of barb clusters at spaced locations along a central supporting portion. Each barb cluster includes a pair of oppositely directed barbs with the respective pairs being ... | 01/12/1988 |
| 4328955 | Defensive personnel barrier A defensive personnel barrier and method for fabrication thereof includes an elongated metal strip having a longitudinally extending bend therein to form a spine extending therealong with laterally opposed flanges extending obliquely from the spine. Each ... | 05/11/1982 |
| 4045985 | Apparatus for making barbed material Apparatus for making barbed material by tractive magnetic means. A work piece of ferrous or other magnetic material is prepared with slits intersecting its edges. The work piece is passed through a guide channel in the apparatus. Along the divergent sides... | 09/06/1977 |
| 3990485 | Barbed wire construction A barbed wire comprises a metal strip having a longitudinally extending reinforcing rib portion and at least one plate portion extending laterally outwardly from the rib portion along its length. The plate portion has a series of triangular contiguous poi... | 11/09/1976 |
| 3941164 | Process for making barbed material A process for making barbed material without scrap loss. The first step in manufacture is slitting the edge of the material to form points. The points are then bent to an exposed position by tractive magnetic means. As an additional step the pointed porti... | 03/02/1976 |
