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 |
| 7726548 | Reusable envelope structures and methods The present invention provides reusable envelope structures, kits for forming reusable envelope structures, and methods of using envelopes formed from such structures and kits. Reusable envelope structures can be formed and kits can be formed for converting existing... | 06/01/2010 |
| 7549571 | Environmentally friendly reusable envelope structures The present invention provides reusable envelope structures, kits for forming reusable envelope structures, and methods of using envelopes formed from such structures and kits. Reusable envelope structures can be formed and kits can be formed for converting existing... | 06/23/2009 |
