Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6318959 | Multi-stage rotary vacuum pump used for high temperature gas | — | 2001-11-20 |
| 6254362 | Vacuum pump with dust collecting function | Tsutomu Higuchi | 2001-07-03 |
| 4995796 | Multi-section roots vacuum pump of reverse flow cooling type | Tutomu Higuchi | 1991-02-26 |
| 4936757 | Multi-section vacuum pump | Tutomu Higuchi | 1990-06-26 |
| 4789314 | Multi-section roots vacuum pump of reverse flow cooling type with internal flow division arrangement | Tsutomu Higuchi | 1988-12-06 |