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 |
| 7063608 | Grinding wheel having core body coated with impermeable coating A grinding wheel including: (a) an annular core body which includes a multiplicity of aggregate particles and a resin bond that holds said aggregate particles together; (b) an abrasive layer which is disposed radially outwardly of said annular core body and which in... | 06/20/2006 |
| 6926598 | Grinding wheel A grinding wheel having a tool portion formed by firmly fixing diamond grains to an end face of a cup-shaped core by brazing. A circumferentially continuous groove is formed in a substantially central portion of the end face of the core. The abrasive grains are firm... | 08/09/2005 |
