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 |
| 4746856 | Semiconductor testing and apparatus therefor A semiconductor die is positioned and examined by means of scanning certain strategic regions which border or overlap said die. The video which results from the scanning is digitized. For example, black is represented by an "0" and white is represented by... | 05/24/1988 |
| 4520313 | Semiconductor testing and apparatus therefor A semiconductor die is positioned and examined by means of scanning certain strategic regions which border or overlap said die. The video which results from the scanning is digitized. For example, black is represented by an "0" and white is represented by... | 05/28/1985 |
