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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (assigned_to = 'Sigma Instruments, Inc.') ORDER BY date ASC, patent, type

Total of 1 patents found where: Assigned To is 'Sigma Instruments, Inc.';

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T / S Patent Date Description Patentee Category Assigned To
 1966
U Specimen known 3,251,014 May 10, 1966 Electrical Coupling Device
Miscellaneous internal coupling device to obtain a voltage from high voltage power line		 STEIN, Laurence B.
 Miscellaneous Sigma Instruments, Inc.

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