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 |
| 5718091 | Construction of a log cabin The invention is a method of building structures from tapered logs which have been manufactured in an industrial setting. The logs are stacked crosswise by fitting a notch in a first log, where the notch has a standardized size and shape, over an end of a... | 02/17/1998 |
