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 |
| 4273455 | Justifying text writing composing machine A mechanism which provides bi-directional movement of the carrier of an electric typewriter incorporating proportional spacing. A ratchet arrangement is operable in both directions to provide the desired proportional spacing increments, with rotation of a... | 06/16/1981 |
