...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 |
| 5046007 | Motor vehicle data collection device The invention includes a device for collecting travel-related data for a motor vehicle. The usage data includes such data as a start time and date of a trip, a beginning odometer reading, a category code indicating the purpose of the trip, a sub-category ... | 09/03/1991 |