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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 (residence = 'Annapolis, MD') ORDER BY date ASC, patent, type

Total of 3 patents found where: Residence is 'Annapolis, MD';

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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.
 1931
U 1,822,458 September 8, 1931 Measuring Apparatus
Device to measure the density of clay slip		 ROWLAND, Davidge H.
ROBERTSON, John C.
 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.

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