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3631311
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Patent number 3,631,311
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Issue date Dec 28, 1971
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H01 - BASIC ELECTRIC ELEMENTS
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3343034
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Patent number 3,343,034
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Issue date Sep 19, 1967
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H01 - BASIC ELECTRIC ELEMENTS
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2942158
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Patent number 2,942,158
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Issue date Jun 21, 1960
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2938716
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Patent number 2,938,716
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Issue date May 31, 1960
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C21 - METALLURGY OF IRON
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2899372
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Patent number 2,899,372
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Issue date Aug 11, 1959
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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2879582
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Patent number 2,879,582
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Issue date Mar 31, 1959
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H01 - BASIC ELECTRIC ELEMENTS
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2793968
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Patent number 2,793,968
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Issue date May 28, 1957
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H01 - BASIC ELECTRIC ELEMENTS
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2739276
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Patent number 2,739,276
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Issue date Mar 20, 1956
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H01 - BASIC ELECTRIC ELEMENTS
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2701285
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Patent number 2,701,285
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Issue date Feb 1, 1955
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H01 - BASIC ELECTRIC ELEMENTS
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2700126
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Patent number 2,700,126
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Issue date Jan 18, 1955
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H01 - BASIC ELECTRIC ELEMENTS
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2694651
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Patent number 2,694,651
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Issue date Nov 16, 1954
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H01 - BASIC ELECTRIC ELEMENTS
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2643199
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Patent number 2,643,199
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Issue date Jun 23, 1953
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H01 - BASIC ELECTRIC ELEMENTS
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2614052
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Patent number 2,614,052
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Issue date Oct 14, 1952
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H01 - BASIC ELECTRIC ELEMENTS