Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4999137 | Semi-conductive ceramic composition and its use in the manufacture of spark plugs | Patrick Balland | 1991-03-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4999137 | Semi-conductive ceramic composition and its use in the manufacture of spark plugs | Patrick Balland | 1991-03-12 |