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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN name ON name.patent = patent.patent AND name.type = patent.type WHERE (last_name = 'STEWARD') AND (first_name = 'Demetrius M.') ORDER BY date ASC, patent, type

Total of 3 patents found where: Last Name is 'STEWARD'; First Name is 'Demetrius M.';

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T / S Patent Date Description Patentee Category Assigned To
 1883
U 271,994 February 6, 1883 Electrical Insulator
Method of treating steatite to make artificial lava insulation
STEWARD, Demetrius M.
Lava  
 1906
U 816,270 March 27, 1906 Refractory Material for Electric Insulation and Other Purposes
Insulating material made of steatite and water glass known as artificial lava
STEWARD, Demetrius M.
Misc  
U 816,271 March 27, 1906 Process of Producing New Refractory Material for the Manufacture of Insulators and Other Uses
Insulating material made of steatite and water glass known as artificial lava
STEWARD, Demetrius M.
Misc  

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