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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 = 'ROBERTSON') AND (first_name = 'John Cullen') ORDER BY date ASC, patent, type

Total of 3 patents found where: Last Name is 'ROBERTSON'; First Name is 'John Cullen';

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T / S Patent Date Description Patentee Category Assigned To
 1928
U 1,677,294 July 17, 1928 Insulator Assembly Jig
Centering jig for assembling multipart porcelain insulators		 ROBERTSON, John Cullen
 Manufacturing Locke Insulator Corp.
 1932
U 1,888,571 November 22, 1932 Pin Centering Device and Cushion Retainer
Means to keep pin centered in a suspension insulator during cementing		 ROBERTSON, John Cullen
 Suspension Locke Insulator Corp.
 1934
U 1,944,134 January 16, 1934 Insulator Assembling Machine
Machine to press on and turn cap to secure the cement and cement in the metal pin		 ROBERTSON, John Cullen
 Manufacturing Locke Insulator Corp.

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