Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9643238 | Manufacturing method of metal shell formed body for spark plug, manufacturing method of metal shell for spark plug, and spark plug manufacturing method | Satoru Ochiai | 2017-05-09 |
| 8322184 | Method of producing metallic shell for spark plug | — | 2012-12-04 |