| 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 = '51') AND (category.subclass = '308') ORDER BY date ASC, patent, type |
Total of 3 patents found where: Class is '51'; Subclass is '308';
View a patent by clicking on the patent number. You can sort by any of the columns by clicking on the column name.
| T / S | Patent | Date | Description | Patentee | Category | Assigned To |
| 1912 | ||||||
| U | 1,049,005 | December 31, 1912 | Insulating Composition and Process of Making the Same Artificial reconstructed lava made from combining soapstone or talc (hydrated silicate of magnesia), with a binder which is the precipitate of a mixture of magnesium sulfate and sodium silicate. The combination is then molded to the desired shape and fired at 1000 to 1300 degrees centigrade or higher. |
STEINMETZ, Charles P. |
Composition | General Electric Co. |
| 1914 | ||||||
U  |
1,091,678 | March 31, 1914 | Insulating Composition Boro-silicate glass |
LOCKE, Fred M. |
Boron | |
| U |
1,091,679 | March 31, 1914 | Insulator Boro-silicate glass |
LOCKE, Fred M. |
Boron | |
Total of 0.00 seconds