. The Scientific American reference book; a compendium of useful information for inventors and mechanics, containing the complete patent laws of the United States ... forms for patents, caveats, assignments, licenses, and shop rights ... etc., etc . ing, now so commonly used tofasten chimneys upon lamps, was accustomed to grant li-censes to manufacturers on receiving a royalty of a fewcents per dozen. His income was at one time reported tobe fifty thousand dollars a year from this source. Howe,the inventor of the sewing-machine, is said to receive ai royalty of from five to ten dollars on each
. The Scientific American reference book; a compendium of useful information for inventors and mechanics, containing the complete patent laws of the United States ... forms for patents, caveats, assignments, licenses, and shop rights ... etc., etc . ing, now so commonly used tofasten chimneys upon lamps, was accustomed to grant li-censes to manufacturers on receiving a royalty of a fewcents per dozen. His income was at one time reported tobe fifty thousand dollars a year from this source. Howe,the inventor of the sewing-machine, is said to receive ai royalty of from five to ten dollars on each machine, and hisi annual income has been estimated at five hundred thousandij dollars. We might give many examples of success. Thelicense and royalty plan is oftentimes the most profitablemethod of employing patents. A Circle is the most capaciousof all plain figures, or contains thegreatest area within the same out-line or perimeter. To find the circumference of acircle, multiply the diameter , and the product will be thecircumference. To find the diameter of a circle,divide the circumference by ,and the quotient will be the diam- Any circle whose diameter is double that of another, con-tains four times the area of the 26 FOREIGN PATENTS. FOREIGN PATENTS. SPLEXDID OPPOBTUNITIES FOR AMERICANS IN OTHER COUNTRIES. _____,__,..«^ The patent laws of Z^-^—^^^^^tZLlI^rr^ -^ various foreign coim- ~^ ^ If the home patent is likely to become valuable liere, the foreign patentwill in most casbs be of equal value. In fact, sucli isthe prestige and fame for ingenuity which Americansenjoy in Europe, that many millions of dollars are nowinvested in tlie manufacture of American all Europe tliere is a large and increasingdemand for American inventions, and those of our in-genious countrymen who neglect to secure Foreign Pa-tents, if their improvements are good, simply tlirowaway golden opportunities. The expenses of procuring patents in Europe bavebe
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