Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6472075 | Sintered silicon nitride member and ceramic ball | — | 2002-10-29 |
| 6464906 | Method of manufacturing spherical bodies by rotation, spherical bodies made by the method and a powder composition for use in the method | Tetsuji Yogo | 2002-10-15 |