| 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 = '200') AND (category.subclass = 'DIG4') ORDER BY date ASC, patent, type |
Total of 7 patents found where: Class is '200'; Subclass is 'DIG4';
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 |
| 1909 | ||||||
| U | 917,785 | April 13, 1909 | Insulating Support for High Tension Conductors Suspension support system |
MERSHON, Ralph D. |
Suspension | |
| 1917 | ||||||
| U | 1,245,940 | November 6, 1917 | Insulator Suspension string of various size disks to balance electrical capacitance |
MARVIN, Richard H. |
Suspension | The R. Thomas & Sons Co. |
| U | 1,250,387 | December 18, 1917 | Electric Insulator Suspension made of several parts bolted together |
THOMAS, Percy H. |
Suspension | |
| 1919 | ||||||
| U | 1,291,217 | January 14, 1919 | Adjustable Suspension Insulator Suspension disk with adjustable length pin to equalize the potential across each disk to reduce arc-over |
SONNEBORN, Sol S. |
Suspension | |
| 1925 | ||||||
| U | 1,521,743 | January 6, 1925 | Insulator Suspension arcing horn system and insulator (see 1,552,664 and 1,783,271) |
AUSTIN, Arthur O. |
Suspension | The Ohio Brass Co. |
U  |
1,552,664 | September 8, 1925 | Insulator Suspension arcing horn insulator (see 1,521,743 and 1,783,271) |
AUSTIN, Arthur O. |
Suspension | The Ohio Brass Co. |
| 1929 | ||||||
| U | 1,710,880 | April 30, 1929 | Insulator Stack Pedestal type stackable insulators with metal flanges that can be easily adjusted |
LAPP, John S. |
Pedestal | Lapp Insulator Co., Inc. |
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