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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 = 'JOHNSTON') AND (first_name = 'Robert M.') ORDER BY date ASC, patent, type

Total of 4 patents found where: Last Name is 'JOHNSTON'; First Name is 'Robert M.';

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T / S Patent Date Description Patentee Category Assigned To
 1910
U 974,672 November 1, 1910 Insulator
Suspension insulator		 JOHNSTON, Robert M.
 Suspension The Ohio Brass Co.
 1920
U Specimen known 1,329,770 February 3, 1920 Insulator
Suspension type for J-D		 JOHNSTON, Robert M.
 Suspension Jeffery-Dewitt Co.
 1929
U Specimen known 1,716,963 June 11, 1929 Insulator
Suspension coupling device (see 1,329,770)		 JOHNSTON, Robert M.
 Suspension Jeffery-Dewitt Co.
 1932
U 1,851,671 March 29, 1932 High Tension Insulator
Suspension insulator with metal attachments fixed with zinc, lead/antimony alloys		 JOHNSTON, Robert M.
MCLACHLAN, Alexander
 Suspension  

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