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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 = '52') AND (category.subclass = '651.02') ORDER BY date ASC, patent, type

Total of 3 patents found where: Class is '52'; Subclass is '651.02';

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T / S Patent Date Description Patentee Category Assigned To
 1905
U 800,935 October 3, 1905 Electric Wire Tower
Steel tower composed of triangular structure
NOYES, La Verne W.
Tower  
 1930
U 1,783,271 December 2, 1930 High Potential Installation
Use of flux control arcing horns (see 1,552,664) to control flashover on towers using strings of suspension disks (see 1,783,272)
AUSTIN, Arthur O.
Transmission The Ohio Brass Co.
U 1,783,272 December 2, 1930 Support for Transmission Lines
Orientation of tower supporting transmission line using flux control arcing harms (see 1,783,271)
AUSTIN, Arthur O.
Transmission The Ohio Brass Co.

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