|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 = '191') AND (category.subclass = '29R') ORDER BY specimen ASC, date, patent, type|
Total of 2 patents found where: Class is '191'; Subclass is '29R';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||771,334||October 4, 1904||Third Rail Insulator
U-shaped third rail insulator metal caps fitting over each part to support rails.
|STEWART, JR., Samuel B.
||Third Rail||General Electric Co.|
|U||908,180||December 29, 1908||Third Rail
Third rail insulator system (Ohio Brass)
|WILGUS, William J.
SPRAGUE, Frank J.
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