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 = '52') AND (category.subclass = '200') ORDER BY specimen ASC, date, patent, type |
Total of 4 patents found where: Class is '52'; Subclass is '200';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1940 | ||||||
U | 2,198,450 | April 23, 1940 | Light Transmitting Structure Skylight construction using glass blocks |
CHERTKOF, Jack O. |
OU | |
1958 | ||||||
U | 2,851,973 | September 16, 1958 | Skylight Construction Skylights made of glass block |
STARK, Charles H. LENKE, George H. |
OI | Owens-Illinois Glass Co. |
U | 2,858,734 | November 4, 1958 | Skylight Glass Block Skylight |
BOYD, Robert A. |
OI | Owens-Illinois Glass Co. |
1960 | ||||||
U | 2,947,267 | August 2, 1960 | Skylight Mounting Glass block for skylight |
STARK, Charles H. |
OI | Owens-Illinois Glass Co. |
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