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LED light signal
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Patent number 8,933,814
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Issue date Jan 13, 2015
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Siemens Aktiengesellschaft
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Eike Berg
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B61 - RAILWAYS
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LED signal lamp
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Patent number 7,883,226
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Issue date Feb 8, 2011
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Intematix Corporation
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Yi-Qun Li
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F21 - LIGHTING
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Multi-color traffic signal
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Patent number 4,283,716
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Issue date Aug 11, 1981
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CIR-S.p.A-Divisione SASIB
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Giancarlo Pasquali
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B61 - RAILWAYS
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3576563
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Patent number 3,576,563
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Issue date Apr 27, 1971
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B61 - RAILWAYS
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2571894
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Patent number 2,571,894
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Issue date Oct 16, 1951
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F21 - LIGHTING
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1728558
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Patent number 1,728,558
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Issue date Sep 17, 1929
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B61 - RAILWAYS
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1475709
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Patent number 1,475,709
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Issue date Nov 27, 1923
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B61 - RAILWAYS
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1389061
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Patent number 1,389,061
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Issue date Aug 30, 1921
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B61 - RAILWAYS
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1069027
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Patent number 1,069,027
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Issue date Jul 29, 1913
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B61 - RAILWAYS
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928021
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Patent number 928,021
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Issue date Jul 13, 1909
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B61 - RAILWAYS
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923874
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Patent number 923,874
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Issue date Jun 8, 1909
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B61 - RAILWAYS
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911746
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Patent number 911,746
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Issue date Feb 9, 1909
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B61 - RAILWAYS
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909146
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Patent number 909,146
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Issue date Jan 12, 1909
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B61 - RAILWAYS
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908654
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Patent number 908,654
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Issue date Jan 5, 1909
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B61 - RAILWAYS
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901331
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Patent number 901,331
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Issue date Oct 20, 1908
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B61 - RAILWAYS
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890737
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Patent number 890,737
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Issue date Jun 16, 1908
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B61 - RAILWAYS