Claims
- 1. A disposable ultrasonic machining tool for machining a plurality of orthodontic brackets at the same time, said tool being made of the following materials by weight:
- Cobalt: 25 percent
- Iron: balance
Parent Case Info
This is a division of Ser. No. 239,320, filed 9-1-88, which is a division of Ser. No. 214,585, filed 7-1-88, which in turn is a division of Ser. No. 046,430 filed 5-6-87 now U.S. Pat. No. 4,835,786.
US Referenced Citations (16)
Divisions (3)
|
Number |
Date |
Country |
Parent |
239320 |
Sep 1988 |
|
Parent |
214585 |
Jul 1988 |
|
Parent |
46430 |
May 1987 |
|