| 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 = 'SIMPSON') AND (first_name = 'Harvey') ORDER BY date ASC, patent, type |
Total of 3 patents found where: Last Name is 'SIMPSON'; First Name is 'Harvey';
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 |
| 1892 | ||||||
| U | 470,514 | March 8, 1892 | Lightning Conductor Hollow conductor rod with slip fittings |
SIMPSON, Harvey |
Lightning Rod | |
| 1895 | ||||||
| U | 538,603 | April 30, 1895 | Lightning Rod Hollow lightning rod with cup to divert water into the lower sections of the rod to improve conduction of current to ground |
SIMPSON, Harvey |
Lightning Rod | |
| 1909 | ||||||
| U | 940,742 | November 23, 1909 | Water Retaining and Conveying Attachment for Cable Lightning Rods Method of retaining water in the ground to aid in conducting the current to ground |
SIMPSON, Harvey |
Lightning Rod | |
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