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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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Class 356/618 - Moire


Subclass of Class 356 - Optics: measuring and testing
Definition: Subject matter wherein the scale or grid is viewed through
No. of applications: 4
Last issue date: 06/16/2011


Application No.Application TitleIssue Date
20110141489MARK POSITION DETECTOR, IMPRINT APPARATUS, AND ARTICLE MANUFACTURING METHOD
A detector for detecting a position of a mark comprises: an image sensing device; an optical system which projects the mark onto an image sensing surface of the image sensing device; a pattern located in a position between the image sensing surface and an optical elemen...
06/16/2011
20080151266Evaluation method for evaluating optical characteristics of optical system, evaluation method for evaluating projector, evaluation device for evaluating optical characteristics, and screen
An evaluation method for evaluating optical characteristics of an optical system, the evaluation method includes: providing an optical system that is an evaluation object and that has a light incidence section and a light emission section; disposing a first pattern havi...
06/26/2008
20080013105Scale Reading Apparatus
Apparatus for measuring displacement between two members. A scale is provided on one member and has an incremental pattern with at least one reference mark embedded in it. A read head is provided on the other member and comprises a periodic diffraction means for interac...
01/17/2008
20060030033Label-free high-throughput optical technique for detecting biomolecular interactions
Methods and compositions are provided for detecting biomolecular interactions. The use of labels is not required and the methods can be performed in a high-throughput manner. The invention also provides optical devices useful as narrow band filters. ...
02/09/2006
 
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