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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 = 'HEMINGRAY') AND (first_name = 'Ralph G.') ORDER BY date ASC, patent, type

Total of 9 patents found where: Last Name is 'HEMINGRAY'; First Name is 'Ralph G.';

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T / S Patent Date Description Patentee Category Assigned To
 1877
U 196,092 October 16, 1877 Improvement in Cleaning Glass From the Ends of Blow-Pipes
Apparatus to remove leftover glass from blow pipes
HEMINGRAY, Ralph G.
HI  
 1883
U 290,771 December 25, 1883 Glass Batch Mixer
Glass batch mixer
HEMINGRAY, Ralph G.
HI  
 1893
U Specimen known 496,652 May 2, 1893 Insulator for Telegraph Wires
Drip points Patent was owned by Hemingray Glass Co.
HEMINGRAY, Ralph G.
GILL, James C.
Drip  
 1897
U 588,795 August 24, 1897 Glass Press
Press for making insulators
HEMINGRAY, Ralph G.
Press  
 1898
U 614,303 November 15, 1898 Glass Press
Press for making insulators
HEMINGRAY, Ralph G.
Press  
 1901
U Specimen known 686,609 November 12, 1901 Insulating Support for Electric Wires
CD 309.5, Telluride ""Type B"" under-hung combined insulators
HEMINGRAY, Ralph G.
Insulator  
 1907
U 866,787 September 24, 1907 Furnace
Producer gas furnace combined with boiler
HEMINGRAY, Ralph G.
JENSEN, John O.
HI  
 1909
U 909,595 January 12, 1909 Screw Press to Form Insulators
Press for making insulators (see reissue 13,661 on 12-23-1913)
HEMINGRAY, Ralph G.
HAWK, Charles
Press Hemingray Glass Co.
 1913
R 13,661 December 23, 1913 Screw Press to Form Insulators
Screw press for insulators (reissue of 909,595)
HEMINGRAY, Ralph G.
HAWK, Charles
Press Hemingray Glass Co.

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