Issued Patents 2011
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7977704 | Semiconductor device having insulated gate semiconductor element, and insulated gate bipolar transistor | Masaki Koyama, Makoto Asai, Takeshi Fujii, Koh Yoshikawa | 2011-07-12 |