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 |
| 6149212 | Adjustable door stop An adjustable door stop that enables a hinged door to be propped open at any desired angle relative to the frame to which the door is mounted. Alternatively, the device enables a door to be securely closed, thereby operating as a lock. The device comprise... | 11/21/2000 |
| 6092777 | Adjustable ceiling suspension system An adjustable suspension system is provided for use from a ceiling. The system effectively comprises a grid including grooves interrupted by recesses. At least one suspension means having a base or retainer adjacent it proximal end depends from the system... | 07/25/2000 |
