Issued Patents 2011
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8028715 | Check valve for vacuum sewage pipe and vacuum sewage system | Osamu Shimizu, Keisuke Ikeda, Fuyuki Ogaki | 2011-10-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8028715 | Check valve for vacuum sewage pipe and vacuum sewage system | Osamu Shimizu, Keisuke Ikeda, Fuyuki Ogaki | 2011-10-04 |