U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

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...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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Examiner: Serofim, N.


Primary examiner statistics: 0 patents; average approval time: N/A
Assistant examiner statistics: 3 patents; average approval time: 466 days

Patents as Primary Examiner

Patent No. Patent Title:
No patents.

Patents as Assistant Examiner

Patent No. Patent Title:
5284708 Modified polytetrafluoroethylene fine powder and process for prep...
4394469 Polysiloxane treated antimony compounds
4383069 Polyarylene sulphide compositions
 
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