...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 |
| 7346968 | Method and apparatus for connecting loops of barbed tape to each other A method and apparatus for automatically attaching loops of a coil together at desired points. The apparatus comprises a frame, a rotatable barrel, wire separators, alignment fingers, a clipping rack further comprising pincers, and a clipping gun. The barrel, wire s... | 03/25/2008 |
| 4903384 | Apparatus for the manufacture of a roll of coiled, clamped barbed wire A method and apparatus for providing barbed strap coils without a core by means of a ring coiling device (50) that has no winder provides a single clamping device (96), whereby the coiling is interrupted for the placement of a clamp. A guide device (11B) ... | 02/27/1990 |