Book on a pocket card

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The Drexler Technology Corporation patent solves the following problem:

One of the best known publications using Microtext is "The Compact Edition of the Oxford English Dictionary", Oxford University Press, 1971. In this work, a large number of volumes in the Oxford English Dictionary dropped into two volumes. Ordinary print size was reduced to the point of almost incomprehensible to the ordinary eye. Without microprinting, libraries and institutions often have Oxford English Dictionary. Using Microtext, many readers may possess widely recognized work.

Our analysis of this patent is as follows:

Drexler Technology Corporation’s patent US 4917292 A deals with Book on a pocket card.
A plastic card or credit card size with a strip of Optical recording material on it containing Microtext. Microtext is whether electronically or optically decreased from 5 to 200 times and placed in small pages, arranged in a war on the strip. strip has a metallic or metal particle layer, giving it a shiny gold or silver coloration, the Microtext so dark, or vice-versa.

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