| 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 = '409') ORDER BY category ASC, date, patent, type |
Total of 4 patents found where: Class is '409';
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 |
| Machine | ||||||
| U | 2,355,684 | August 15, 1944 | Insulator Cutting Machine Machine to automatically trim the profile in insulators in an assembly line process |
SKIPPER, Edward M. |
Machine | Locke Insulator Corp. |
| OI | ||||||
| U | 2,181,810 | November 28, 1939 | Glass Block Trimmer Trimmer to remove excess bonding agent from glass blocks |
HAWK, Charles E. |
OI | Owens-Illinois Glass Co. |
| Suspension | ||||||
| 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. |
| 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. |
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