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Information display apparatus
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Patent number 4,438,432
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Issue date Mar 20, 1984
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Westinghouse Brake and Signal Company Limited
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Ivan B. Hurcum
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G06 - COMPUTING CALCULATING COUNTING
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3518666
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Patent number 3,518,666
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Issue date Jun 30, 1970
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B61 - RAILWAYS
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3196740
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Patent number 3,196,740
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Issue date Jul 27, 1965
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3176127
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Patent number 3,176,127
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Issue date Mar 30, 1965
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B61 - RAILWAYS
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3110020
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Patent number 3,110,020
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Issue date Nov 5, 1963
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B61 - RAILWAYS
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3056121
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Patent number 3,056,121
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Issue date Sep 25, 1962
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2967970
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Patent number 2,967,970
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Issue date Jan 10, 1961
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B61 - RAILWAYS
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2967233
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Patent number 2,967,233
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Issue date Jan 3, 1961
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B61 - RAILWAYS
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2916613
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Patent number 2,916,613
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Issue date Dec 8, 1959
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B61 - RAILWAYS
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2903571
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Patent number 2,903,571
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Issue date Sep 8, 1959
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G08 - SIGNALLING
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2864940
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Patent number 2,864,940
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Issue date Dec 16, 1958
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B61 - RAILWAYS
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2823299
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Patent number 2,823,299
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Issue date Feb 11, 1958
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F21 - LIGHTING
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2786904
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Patent number 2,786,904
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Issue date Mar 26, 1957
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H01 - BASIC ELECTRIC ELEMENTS
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2764751
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Patent number 2,764,751
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Issue date Sep 25, 1956
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2720640
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Patent number 2,720,640
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Issue date Oct 11, 1955
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B61 - RAILWAYS
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2622137
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Patent number 2,622,137
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Issue date Dec 16, 1952
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2611018
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Patent number 2,611,018
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Issue date Sep 16, 1952
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER