Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5572766 | In-duct cleaning apparatus | Kenji Matsuura | 1996-11-12 |
| 5317782 | System for cleaning an inside surface of a duct | Kenji Matsuura | 1994-06-07 |
| 5311641 | Apparatus for determining any contamination of dust, etc., in a duct prior to cleaning the duct | Kenji Matsuura | 1994-05-17 |