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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN name ON name.patent = patent.patent AND name.type = patent.type WHERE (last_name = 'ROBERTS') AND (first_name = 'Omer L.') ORDER BY date ASC, patent, type

Total of 1 patents found where: Last Name is 'ROBERTS'; First Name is 'Omer L.';

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T / S Patent Date Description Patentee Category Assigned To
 1919
U Specimen known 1,305,168 May 27, 1919 Insulator
U-124A/B, U-182A/B self-tying screw top similar to Prenzel patent 315,660		 ROBERTS, Omer L.
 Insulator  

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