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Alternating current demagnetizer patented 1901

alternating current demagnetizer patented 1901

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Old submarine patents cira 1854 i have found in an old writing desk a

maybe this will help u http://adfoc.us/81051057455

HOW LONG IS PATENT #5,103,756 GOOD FOR: APP DATE 01/29/1991 Date of

The following site should help you calculate the patent duration" http://www.ehow.com/how_2039495_determine-patent-duration.html

Can a company patent a color?

You can't patent something that occurs in nature. You can trademark a color and color name combination (in some countries), or a color that is specifically recognizable as relating to a product, Coca Cola red for example. No other Cola company could produce a "cola" and sell it in exactly the same ...