SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '156') AND (category.subclass = '305') ORDER BY type ASC, date, patent |
Total of 2 patents found where: Class is '156'; Subclass is '305';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1926 | ||||||
U | 1,574,883 | March 2, 1926 | Method and Apparatus for Cementing Insulators Machine to vibrate insulator to improve cementing of the parts |
HARVEY, William F. |
Manufacturing | |
1929 | ||||||
U | 1,719,989 | July 9, 1929 | Method of and Apparatus for Assembling Insulators Method of assembling the shells, holding downward pressure, and vibrating to settle cement around the shells to eliminate air |
MOORE, JR., Stewart L. |
Manufacturing | Locke Insulator Corp. |
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