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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (category = 'Spool') ORDER BY date ASC, patent, type

Total of 3 patents found where: Category is 'Spool';

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T / S Patent Date Description Patentee Category Assigned To
 1884
U 298,594 May 13, 1884 Terminal Insulator
Spool (skirted) with bracket to act as terminal wire support
LEWIS, Joseph Slater
Spool 1/2 to William P. Thompson
 1889
U 400,552 April 2, 1889 Telegraph Wire Carrier
Two spools mounted together to secure telegraph wire between them and mounted on a crossarm
DONALDSON, Robert S.
Spool  
 1942
U Specimen known 2,286,488 June 16, 1942 Spool Insulator
Spool insulator with deep side groove
JOHNSON, Lewis E.
Spool Porcelain Products, Inc.

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