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 |
| 5641078 | Device for filling writing, drawing, printing, or painting utensils A device for filling a writing utensil with a writing liquid has a container having an interior for receiving the writing liquid and a container opening for refilling the interior with the writing liquid. A receiving member is inserted into the container ... | 06/24/1997 |
