Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7743731 | Reduced contaminant gas injection system and method of using | Takashi Enomoto, Masaaki Hagihara, Akiteru Ko, Shinji Hamamoto, Masafumi Urakawa +1 more | 2010-06-29 |
| 4652915 | Method for polling headphones of a passive TV audience meter system | — | 1987-03-24 |