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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 = '248') AND (category.subclass = '230.1') ORDER BY date ASC, patent, type

Total of 3 patents found where: Class is '248'; Subclass is '230.1';

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T / S Patent Date Description Patentee Category Assigned To
U 871,490 November 19, 1907 Insulator Pin Mounting
Mounting for hollow steel pin on a steel tower
DUNCAN, John D. E.
U 1,175,849 March 14, 1916 Insulator Base
miscellaneous circular holder with metal support
WARREN, Frederic A.
U 2,222,810 November 26, 1940 Clamp for Connecting an Insulator to a Post
Electric fence with bracket to attach an easily adjustable insulator to a T-post
DAILY, Floyd H.

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