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One of the earliest readers of microfilm was the Coddington Magnifier. Developed by Sir David Brewster, this magnifier was a "simple plano-convex lens of such thickness that the focus of its spherical curvature coincides with the flat surface of the lens. [2] On June 21, 1859, the first patent for a microfilm was issued to Rene Dargon in France.
This reading magnifier makes it easier to see books, newspapers, and so much more. (Photo: Amazon) "Love it!" one customer raved. "The packaging seems to be geared toward seniors. I’m only 50 ...
Valuation of patent rights is one of the main activities related to intellectual property management within an organization or company. Indeed, knowing the economic value and importance of the intellectual property rights assists in the strategic decisions to be taken on the company's assets, but also facilitates the commercialization and transactions concerning intellectual property rights.
Thus, while a "full page magnifier" based on a fresnel lens can span some 625 cm 2 (96.9 sq in) , it typically achieves no more than 1.4x magnification (advertised as "2x" if measured by area instead of the scale factor); an aspheric segment hand magnifier can achieve a scale factor in excess of two (area factor in excess of four) but typically ...
A Coddington magnifier provides higher magnification with improved image quality. Even better images can be obtained with a multiple-lens magnifier, such as a Hastings triplet. High power magnifiers are sometimes mounted in a cylindrical or conical holder with no handle, often designed to be worn on the head; this is called a loupe.
Officials have so far recovered 44 packages, allowing them to be “delivered to their rightful owners.” Lewis was charged with grand theft, illegal dumping and organized scheme to defraud.
The Detroit Lions are 11-1 for the first time in their 95-season history, yet have almost no room to spare with the Minnesota Vikings (10-2) and Green Bay Packers (9-3) breathing down their manes ...
A dome magnifier is a dome-shaped magnifying device made of glass or acrylic plastic, used to enlarge words on a page or computer screen. They are plano-convex lenses: the flat (planar) surface is placed on the object to be magnified, and the convex (dome) surface provides the enlargement. They usually provide between 1.8× and 6× ...
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