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 |
| 5201046 | Relational database management system and method for storing, retrieving and modifying directed graph data structures An improved database management system (DBMS) stores, retrieves and manipulates directed graph data structures in a relational database. Each directed graph data structure contains one or more records of data which are interconnected by pointers. Data is ... | 04/06/1993 |
