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 |
| 5283510 | Method for driving three phase stepping motor As a method for energizing a three-phase stepping motor of Y-connection, driving current values are set to be values resembling sine wave input approximation, thus making it possible to effect driving at small vibration. Energizing of the three-phase step... | 02/01/1994 |
| 4292572 | Method and apparatus for regulating electric motor armature currents A method and apparatus are described for regulating the armature currents of a plurality of electric motors connected to share the same load, but having separate power sources. The described method and apparatus thereby operate to enhance the load-sharing... | 09/29/1981 |
