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 |
| 4395137 | Synchronizing system for oscillating mechanism A method and apparatus for accurately controlling a timekeeping apparatus utilizing a relatively heavy free pendulum or other harmonic structure carrying a permanent magnet, and a powered harmonic structure carrying a ferromagnetic element. The magnet is ... | 07/26/1983 |
| 4074473 | Controlled thermal expansivity structure A controlled thermal expansivity structure whose length along a given axis of the structure and thermal expansivity in the direction of the axis, i.e. total change in length in response to a given temperature change, are independently adjustable in a mann... | 02/21/1978 |
