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Roadway antennae
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Patent number 5,192,954
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Issue date Mar 9, 1993
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Mark IV Transportation Products Corporation
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William K. Brockelsby
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G06 - COMPUTING CALCULATING COUNTING
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Electronic identification system
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Patent number 4,937,581
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Issue date Jun 26, 1990
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EID Electronic Identification Systems Ltd.
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Howard A Baldwin
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G06 - COMPUTING CALCULATING COUNTING
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Electronic identification system
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Patent number 4,870,419
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Issue date Sep 26, 1989
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EID Electronic Identification Systems, Ltd.
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Howard A. Baldwin
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G06 - COMPUTING CALCULATING COUNTING