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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 = '5R') ORDER BY date ASC, patent, type

Total of 3 patents found where: Class is '174'; Subclass is '5R';

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T / S Patent Date Description Patentee Category Assigned To
 1886
U 343,014 June 1, 1886 Means for Preventing Disturbances on Telephone Lines
Pre-transposition technique to eliminate induced current on telephone and telegraph wires		 DANN, John E.
LAPP, John
 Transposition  
 1929
U Specimen known 1,734,597 November 5, 1929 Nonskidding Insulated Stool
Lineman's stool with four rubber legs that have two downward curved flanged skirts.		 SALISBURY, Moses B.
 Stool  
 1930
U 1,786,458 December 30, 1930 Insulating Nontilting Stool
Insulated stool composed of multiple plies of hardwood with extended legs. Pintype insulators are used to support the legs and insulate the stool.		 SHIPMAN, Emanuel F.
 Stool  

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