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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 = '427') AND (category.subclass = '427') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '427'; Subclass is '427';

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T / S Patent Date Description Patentee Category Assigned To
 1941
U 2,230,205 January 28, 1941 Process of Connecting a Metal Body to a Vitreous Ceramic Body
Metallic coating to facilitate soldering metal parts onto the insulator		 ROWLAND, Davidge H.
CROSKEY, Carl D.
 Miscellaneous Locke Insulator Corp.
 1944
U 2,357,550 September 5, 1944 Insulator
RFI coating applied before firing the insulator		 ROWLAND, Davidge H.
 RFI Locke Insulator Corp.

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