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Discriminator device
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Patent number 4,480,241
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Issue date Oct 30, 1984
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Northern Engineering Industries plc
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Raymond T. Morris
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G08 - SIGNALLING
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Electromagnetic indicator
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Patent number 4,132,986
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Issue date Jan 2, 1979
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General Time Corporation
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Robert D. Hart
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G08 - SIGNALLING
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Indication system
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Patent number 4,131,886
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Issue date Dec 26, 1978
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Nippondenso Co., Ltd.
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Shuichi Kosuge
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B60 - VEHICLES IN GENERAL
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Indication apparatus
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Patent number 4,090,194
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Issue date May 16, 1978
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Nippondenso Co., Ltd.
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Shuichi Kosuge
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B60 - VEHICLES IN GENERAL
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3553619
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Patent number 3,553,619
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Issue date Jan 5, 1971
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G08 - SIGNALLING
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3524358
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Patent number 3,524,358
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Issue date Aug 18, 1970
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G08 - SIGNALLING
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3518664
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Patent number 3,518,664
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Issue date Jun 30, 1970
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G08 - SIGNALLING
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3465333
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Patent number 3,465,333
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Issue date Sep 2, 1969
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G08 - SIGNALLING
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3441927
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Patent number 3,441,927
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Issue date Apr 29, 1969
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G08 - SIGNALLING
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3430605
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Patent number 3,430,605
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Issue date Mar 4, 1969
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G08 - SIGNALLING
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3418576
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Patent number 3,418,576
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Issue date Dec 24, 1968
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G08 - SIGNALLING
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3368215
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Patent number 3,368,215
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Issue date Feb 6, 1968
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G08 - SIGNALLING
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3350709
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Patent number 3,350,709
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Issue date Oct 31, 1967
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G08 - SIGNALLING
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3309696
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Patent number 3,309,696
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Issue date Mar 14, 1967
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G08 - SIGNALLING
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3295238
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Patent number 3,295,238
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Issue date Jan 3, 1967
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G08 - SIGNALLING
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3240965
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Patent number 3,240,965
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Issue date Mar 15, 1966
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G08 - SIGNALLING
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3230508
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Patent number 3,230,508
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Issue date Jan 18, 1966
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G06 - COMPUTING CALCULATING COUNTING