| 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 = '408') ORDER BY date ASC, patent, type |
Total of 7 patents found where: Class is '408';
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 |
| 1887 | ||||||
| U | 373,393 | November 15, 1887 | Tool for Cutting Seats for Insulator Attachments for Musical Instruments Tool for cutting circular slot in piano legs in order to insert the piano insulator. |
DEWING, James BENNETT, Delbert F. |
Piano Insulator | |
| 1910 | ||||||
| U | 954,490 | April 12, 1910 | Machine for Threading Porcelain Insulators Machine to form threads in wet process porcelain |
YOUNG, George F. |
Thread | Pittsburg High Voltage Insulator Co. |
| 1912 | ||||||
| U | 1,022,874 | April 9, 1912 | Machine for Drilling Porcelain Machine for drilling U-shaped holes in Hewlett suspension disk |
RIDDELL, John |
Suspension | General Electric Co. |
| 1916 | ||||||
| U | 1,191,595 | July 18, 1916 | Machine for Forming Porcelain Ware Machine to cut out and shape the Hewlett suspension disk |
HEWLETT, Edward M. |
Suspension | General Electric Co. |
| 1927 | ||||||
| U | 1,625,514 | April 19, 1927 | Apparatus for Forming Plastic Materials Improved press to form insulator shape from wet process clay and cut in threaded pinhole |
AUSTIN, Arthur O. MACLEOD, Donald Keith |
Press | The Ohio Brass co. |
| 1928 | ||||||
| U | 1,663,329 | March 20, 1928 | Forming and Tapping Machine Machine to form threads in plastic clay bodies |
AUSTIN, Arthur O. |
Manufacturing | The Ohio Brass Co. |
| 1944 | ||||||
| U | 2,341,309 | February 8, 1944 | Cutting Tool Cutting tool to remove clay from inside a bushing |
BETTINI, David Joseph |
Cutting Tool | Locke Insulator Corp. |
Total of 0.00 seconds