| Number | Name | Date | Kind |
|---|---|---|---|
| 1249955 | Hendrickson | Dec 1917 | |
| 1280244 | Kroedel | Oct 1918 | |
| 1838935 | Fixsen | Dec 1931 | |
| 2455606 | Pleiss | Dec 1948 | |
| 4148454 | Carlson | Apr 1979 | |
| 4979713 | Bell | Dec 1990 | |
| 5022104 | Miller | Jun 1991 | |
| 5071099 | Kuo | Dec 1991 | |
| 5076523 | Wang | Dec 1991 |
| Entry |
|---|
| Franklin Brass Catalog 250, pp. 1-31, published more than one year prior to the filing date of the present application. |