Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7216466 | Universal ridge clip The present invention is a universal ridge clip for attachment of a ridge cap along the peak of a centrally located roof ridge, usually on metal buildings. The clip may also be used on a “hip” roof application. The ridge clip is of a construction such that it pr... | 05/15/2007 |
| 7089870 | Isolation mounting system for railroad car steps and running boards A mounting system is provided for securing a metal support surface to a metal bracket on a railroad car. The invention is improved by a compressible, energy absorbing arrangement secured intermediate the support surface and the bracket for preventing metal to metal ... | 08/15/2006 |
| 6223477 | Device to secure snow guard to roof using a wedge The present invention comprises a block having a first and a second exterior side wall, a base and a top. A groove is located in the base of the block, the groove defining a first and a second interior side wall and a top interior surface. The block is lo... | 05/01/2001 |
| 6079167 | Continuous ridge skylight system A building skylight system providing novel and improved cooperation between the skylight and a standing seam roof structure to accommodate thermally induced movement of the standing seam roof panels.... | 06/27/2000 |
