| 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 = '403') AND (category.subclass = '230') ORDER BY date ASC, patent, type |
Total of 4 patents found where: Class is '403'; Subclass is '230';
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 |
| 1865 | ||||||
| U | 49,633 | August 29, 1865 | Joints of Lightning Rods Joint or coupling for tubular lightning rod that slips over the rod and secured with a screw |
KING, L. |
Lightning Rod Coupling | |
| 1879 | ||||||
| U | 215,516 | May 20, 1879 | Improvement in Devices for Attaching Plungers to Glass Presses Means of attaching a plunger to a glass press using a chuck. (This is known as the ""Gill Chuck"" and may have been used in insulator production, it is not known if Gill was employed by Hemingray at the time of this patent.) |
GILL, James G. |
Plunger | |
| 1908 | ||||||
| U | 882,979 | March 24, 1908 | Strain Insulator Wood strain insulator with metal caps on each end and special eye to receive a hook |
TERRY, William C. |
Strain | The MacAllen Co. |
| 1921 | ||||||
| U | 1,385,638 | July 26, 1921 | Supporting Bracket Steel pin with lag screw and spring for threads |
MILLER, Charles E. |
Pin | |
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