Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5990602 | Long life spark plug having minimum noble metal amount | Keiji Kanao | 1999-11-23 |
| 5563468 | Spark plug having arc-shaped precious metal chip and method of producing the same | Nobuo Abe | 1996-10-08 |
| 5502994 | Method for producing a metal tip | Kazuo Hamada | 1996-04-02 |
| 5502352 | Spark plug having horizontal discharge | Kozo Takamura | 1996-03-26 |
| 5502351 | Spark plug having horizontal discharge gap | Nobuo Abe | 1996-03-26 |
| 5465022 | Spark plug for internal-combustion engine and manufacture method of the same | Nobuo Abe, Takeshi Hanai, Kenji Horibe | 1995-11-07 |
| 5406166 | Long life spark plug having consumable discharge member | Nobuo Abe, Kozo Takamura | 1995-04-11 |