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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 = '174') AND (category.subclass = '27') ORDER BY date ASC, patent, type

Total of 4 patents found where: Class is '174'; Subclass is '27';

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T / S Patent Date Description Patentee Category Assigned To
 1878
U 199,506 January 22, 1878 Improvement in Insulating Underground Telegraph Wires
Underground cable insulated by wrapping with cotton, hemp, or jute and saturating it with paraffin and inserting the wires in heated metal pipes flushed with air to remove moisture.
BROOKS, David
Cable  
 1882
U 252,857 January 24, 1882 Insulator for Telegraph Wires
Insulators strung on wires to separate groups of wires in a tube
GORE, Charles L.
Insulator 1/4 to John Townsend
 1934
U 1,977,957 October 23, 1934 Bus Bar and Bushing Connection
Connector to hold bus bar inside a bushing
STEVENS, Leland S.
Bushing Locke Insulator Corp.
U 1,978,649 October 30, 1934 Bus Bar and Bushing Connection
Connector to hold bus bar inside a bushing
ROBERTS, Charles W.
Bushing Locke Insulator Corp.

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