The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
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| Number | Title | Issue Date |
| 7591119 | Method and apparatus for increasing the capacity and stability of a single-pole tower A support structure for use with an existing single pole tower. The single pole tower has a pole anchored to a foundation and supports a first load. The support structure has a number of sleeves surrounding the pole. A first one of the sleeves is anchored to the fou... | 09/22/2009 |
| 6948290 | System and method for increasing the load capacity and stability of guyed towers A guyed tower is used to support wireless communication equipment and/or other types of loads. The guyed tower is fixedly attached to a foundation, and a pole tower is erected within a middle region of the guyed tower. This pole tower is also fixedly attached to the... | 09/27/2005 |
| 6668498 | System and method for supporting guyed towers having increased load capacity and stability A guyed tower is used to support wireless communication equipment and/or other types of loads. The guyed tower is fixedly attached to a foundation, and a pole tower is erected within a middle region of the guyed tower. This pole tower is fixedly attached ... | 12/30/2003 |